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Finding the Fourth Proportional to 15,604.78, 21,534.60 and 8,531.20

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Solution

The fourth proportional to 15,604.78, 21,534.60 and 8,531.20 is: 11,773.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,604.78 : 21,534.60 = 8,531.20 : x
  2. Step 2: Convert to fraction form
    15,604.78/21,534.60 = 8,531.20/x
  3. Step 3: Cross multiply
    15,604.78x = 21,534.60 × 8,531.20
  4. Step 4: Simplify right side
    15,604.78x = 183,715,979.52
  5. Step 5: Solve for x
    x = 183,715,979.52/15,604.78
  6. Step 6: Final answer
    x = 11,773.06

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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.