Home / 20,932.14-28,885.80-11,500.72

Finding the Fourth Proportional to 20,932.14, 28,885.80 and 11,500.72

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Solution

The fourth proportional to 20,932.14, 28,885.80 and 11,500.72 is: 15,870.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,932.14 : 28,885.80 = 11,500.72 : x
  2. Step 2: Convert to fraction form
    20,932.14/28,885.80 = 11,500.72/x
  3. Step 3: Cross multiply
    20,932.14x = 28,885.80 × 11,500.72
  4. Step 4: Simplify right side
    20,932.14x = 332,207,497.78
  5. Step 5: Solve for x
    x = 332,207,497.78/20,932.14
  6. Step 6: Final answer
    x = 15,870.69

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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.