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Finding the Fourth Proportional to 12,840.48, 19,260.72 and 7,008.48

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Solution

The fourth proportional to 12,840.48, 19,260.72 and 7,008.48 is: 10,512.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,840.48 : 19,260.72 = 7,008.48 : x
  2. Step 2: Convert to fraction form
    12,840.48/19,260.72 = 7,008.48/x
  3. Step 3: Cross multiply
    12,840.48x = 19,260.72 × 7,008.48
  4. Step 4: Simplify right side
    12,840.48x = 134,988,370.91
  5. Step 5: Solve for x
    x = 134,988,370.91/12,840.48
  6. Step 6: Final answer
    x = 10,512.72

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Half scale
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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.