Home / 15,780.62-21,777.27-8,610.55

Finding the Fourth Proportional to 15,780.62, 21,777.27 and 8,610.55

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Solution

The fourth proportional to 15,780.62, 21,777.27 and 8,610.55 is: 11,882.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,780.62 : 21,777.27 = 8,610.55 : x
  2. Step 2: Convert to fraction form
    15,780.62/21,777.27 = 8,610.55/x
  3. Step 3: Cross multiply
    15,780.62x = 21,777.27 × 8,610.55
  4. Step 4: Simplify right side
    15,780.62x = 187,514,356.40
  5. Step 5: Solve for x
    x = 187,514,356.40/15,780.62
  6. Step 6: Final answer
    x = 11,882.57

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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.