Home / 15,520.92-21,419.57-9,147.78

Finding the Fourth Proportional to 15,520.92, 21,419.57 and 9,147.78

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Solution

The fourth proportional to 15,520.92, 21,419.57 and 9,147.78 is: 12,624.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,520.92 : 21,419.57 = 9,147.78 : x
  2. Step 2: Convert to fraction form
    15,520.92/21,419.57 = 9,147.78/x
  3. Step 3: Cross multiply
    15,520.92x = 21,419.57 × 9,147.78
  4. Step 4: Simplify right side
    15,520.92x = 195,941,514.05
  5. Step 5: Solve for x
    x = 195,941,514.05/15,520.92
  6. Step 6: Final answer
    x = 12,624.35

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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.