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Finding the Fourth Proportional to 15,605.97, 21,538.14 and 8,801.29

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Solution

The fourth proportional to 15,605.97, 21,538.14 and 8,801.29 is: 12,146.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.97 : 21,538.14 = 8,801.29 : x
  2. Step 2: Convert to fraction form
    15,605.97/21,538.14 = 8,801.29/x
  3. Step 3: Cross multiply
    15,605.97x = 21,538.14 × 8,801.29
  4. Step 4: Simplify right side
    15,605.97x = 189,563,410.12
  5. Step 5: Solve for x
    x = 189,563,410.12/15,605.97
  6. Step 6: Final answer
    x = 12,146.86

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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.