Home / 20,885.47-28,823.48-11,932.78

Finding the Fourth Proportional to 20,885.47, 28,823.48 and 11,932.78

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Solution

The fourth proportional to 20,885.47, 28,823.48 and 11,932.78 is: 16,468.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.47 : 28,823.48 = 11,932.78 : x
  2. Step 2: Convert to fraction form
    20,885.47/28,823.48 = 11,932.78/x
  3. Step 3: Cross multiply
    20,885.47x = 28,823.48 × 11,932.78
  4. Step 4: Simplify right side
    20,885.47x = 343,944,288.91
  5. Step 5: Solve for x
    x = 343,944,288.91/20,885.47
  6. Step 6: Final answer
    x = 16,468.11

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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.