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Finding the Fourth Proportional to 15,572.10, 21,490.14 and 8,498.88

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Solution

The fourth proportional to 15,572.10, 21,490.14 and 8,498.88 is: 11,728.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.10 : 21,490.14 = 8,498.88 : x
  2. Step 2: Convert to fraction form
    15,572.10/21,490.14 = 8,498.88/x
  3. Step 3: Cross multiply
    15,572.10x = 21,490.14 × 8,498.88
  4. Step 4: Simplify right side
    15,572.10x = 182,642,121.04
  5. Step 5: Solve for x
    x = 182,642,121.04/15,572.10
  6. Step 6: Final answer
    x = 11,728.80

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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.