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Finding the Fourth Proportional to 21,572.34, 29,767.82 and 15,910.17

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Solution

The fourth proportional to 21,572.34, 29,767.82 and 15,910.17 is: 21,954.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,572.34 : 29,767.82 = 15,910.17 : x
  2. Step 2: Convert to fraction form
    21,572.34/29,767.82 = 15,910.17/x
  3. Step 3: Cross multiply
    21,572.34x = 29,767.82 × 15,910.17
  4. Step 4: Simplify right side
    21,572.34x = 473,610,997.18
  5. Step 5: Solve for x
    x = 473,610,997.18/21,572.34
  6. Step 6: Final answer
    x = 21,954.55

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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.