Home / 20,710.61-28,581.24-11,279.78

Finding the Fourth Proportional to 20,710.61, 28,581.24 and 11,279.78

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Solution

The fourth proportional to 20,710.61, 28,581.24 and 11,279.78 is: 15,566.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.61 : 28,581.24 = 11,279.78 : x
  2. Step 2: Convert to fraction form
    20,710.61/28,581.24 = 11,279.78/x
  3. Step 3: Cross multiply
    20,710.61x = 28,581.24 × 11,279.78
  4. Step 4: Simplify right side
    20,710.61x = 322,389,956.42
  5. Step 5: Solve for x
    x = 322,389,956.42/20,710.61
  6. Step 6: Final answer
    x = 15,566.42

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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.