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Finding the Fourth Proportional to 12,762,003.20, 19,143,004.80 and 9,892,221.80

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Solution

The fourth proportional to 12,762,003.20, 19,143,004.80 and 9,892,221.80 is: 14,838,332.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,762,003.20 : 19,143,004.80 = 9,892,221.80 : x
  2. Step 2: Convert to fraction form
    12,762,003.20/19,143,004.80 = 9,892,221.80/x
  3. Step 3: Cross multiply
    12,762,003.20x = 19,143,004.80 × 9,892,221.80
  4. Step 4: Simplify right side
    12,762,003.20x = 189,366,849,400,064.66
  5. Step 5: Solve for x
    x = 189,366,849,400,064.66/12,762,003.20
  6. Step 6: Final answer
    x = 14,838,332.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.