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Finding the Fourth Proportional to 15,025.21, 22,531.24 and 7,129.99

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Solution

The fourth proportional to 15,025.21, 22,531.24 and 7,129.99 is: 10,691.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,025.21 : 22,531.24 = 7,129.99 : x
  2. Step 2: Convert to fraction form
    15,025.21/22,531.24 = 7,129.99/x
  3. Step 3: Cross multiply
    15,025.21x = 22,531.24 × 7,129.99
  4. Step 4: Simplify right side
    15,025.21x = 160,647,437.86
  5. Step 5: Solve for x
    x = 160,647,437.86/15,025.21
  6. Step 6: Final answer
    x = 10,691.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.