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Finding the Fourth Proportional to 15,958.71, 22,013.34 and 9,985.47

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Solution

The fourth proportional to 15,958.71, 22,013.34 and 9,985.47 is: 13,773.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,958.71 : 22,013.34 = 9,985.47 : x
  2. Step 2: Convert to fraction form
    15,958.71/22,013.34 = 9,985.47/x
  3. Step 3: Cross multiply
    15,958.71x = 22,013.34 × 9,985.47
  4. Step 4: Simplify right side
    15,958.71x = 219,813,546.17
  5. Step 5: Solve for x
    x = 219,813,546.17/15,958.71
  6. Step 6: Final answer
    x = 13,773.89

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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.