Home / 15,780.42-21,776.85-8,610.44

Finding the Fourth Proportional to 15,780.42, 21,776.85 and 8,610.44

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Solution

The fourth proportional to 15,780.42, 21,776.85 and 8,610.44 is: 11,882.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.42 : 21,776.85 = 8,610.44 : x
  2. Step 2: Convert to fraction form
    15,780.42/21,776.85 = 8,610.44/x
  3. Step 3: Cross multiply
    15,780.42x = 21,776.85 × 8,610.44
  4. Step 4: Simplify right side
    15,780.42x = 187,508,151.43
  5. Step 5: Solve for x
    x = 187,508,151.43/15,780.42
  6. Step 6: Final answer
    x = 11,882.33

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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.