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Finding the Fourth Proportional to 11,695.59, 16,140.06 and 6,390.63

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Solution

The fourth proportional to 11,695.59, 16,140.06 and 6,390.63 is: 8,819.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,695.59 : 16,140.06 = 6,390.63 : x
  2. Step 2: Convert to fraction form
    11,695.59/16,140.06 = 6,390.63/x
  3. Step 3: Cross multiply
    11,695.59x = 16,140.06 × 6,390.63
  4. Step 4: Simplify right side
    11,695.59x = 103,145,151.64
  5. Step 5: Solve for x
    x = 103,145,151.64/11,695.59
  6. Step 6: Final answer
    x = 8,819.15

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.