Home / 15,489.29-21,375.27-8,776.16

Finding the Fourth Proportional to 15,489.29, 21,375.27 and 8,776.16

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Solution

The fourth proportional to 15,489.29, 21,375.27 and 8,776.16 is: 12,111.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,489.29 : 21,375.27 = 8,776.16 : x
  2. Step 2: Convert to fraction form
    15,489.29/21,375.27 = 8,776.16/x
  3. Step 3: Cross multiply
    15,489.29x = 21,375.27 × 8,776.16
  4. Step 4: Simplify right side
    15,489.29x = 187,592,789.56
  5. Step 5: Solve for x
    x = 187,592,789.56/15,489.29
  6. Step 6: Final answer
    x = 12,111.13

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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.