Home / 20,710.89-28,581.12-11,279.46

Finding the Fourth Proportional to 20,710.89, 28,581.12 and 11,279.46

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Solution

The fourth proportional to 20,710.89, 28,581.12 and 11,279.46 is: 15,565.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,710.89 : 28,581.12 = 11,279.46 : x
  2. Step 2: Convert to fraction form
    20,710.89/28,581.12 = 11,279.46/x
  3. Step 3: Cross multiply
    20,710.89x = 28,581.12 × 11,279.46
  4. Step 4: Simplify right side
    20,710.89x = 322,379,599.80
  5. Step 5: Solve for x
    x = 322,379,599.80/20,710.89
  6. Step 6: Final answer
    x = 15,565.70

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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.