Home / 20,930.86-28,885.25-11,499.62

Finding the Fourth Proportional to 20,930.86, 28,885.25 and 11,499.62

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Solution

The fourth proportional to 20,930.86, 28,885.25 and 11,499.62 is: 15,869.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.86 : 28,885.25 = 11,499.62 : x
  2. Step 2: Convert to fraction form
    20,930.86/28,885.25 = 11,499.62/x
  3. Step 3: Cross multiply
    20,930.86x = 28,885.25 × 11,499.62
  4. Step 4: Simplify right side
    20,930.86x = 332,169,398.61
  5. Step 5: Solve for x
    x = 332,169,398.61/20,930.86
  6. Step 6: Final answer
    x = 15,869.84

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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.