Home / 15,572.85-21,489.68-8,499.12

Finding the Fourth Proportional to 15,572.85, 21,489.68 and 8,499.12

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Solution

The fourth proportional to 15,572.85, 21,489.68 and 8,499.12 is: 11,728.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,572.85 : 21,489.68 = 8,499.12 : x
  2. Step 2: Convert to fraction form
    15,572.85/21,489.68 = 8,499.12/x
  3. Step 3: Cross multiply
    15,572.85x = 21,489.68 × 8,499.12
  4. Step 4: Simplify right side
    15,572.85x = 182,643,390.33
  5. Step 5: Solve for x
    x = 182,643,390.33/15,572.85
  6. Step 6: Final answer
    x = 11,728.32

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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.