Home / 20,384.56-28,132.88-11,432.88

Finding the Fourth Proportional to 20,384.56, 28,132.88 and 11,432.88

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Solution

The fourth proportional to 20,384.56, 28,132.88 and 11,432.88 is: 15,778.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.56 : 28,132.88 = 11,432.88 : x
  2. Step 2: Convert to fraction form
    20,384.56/28,132.88 = 11,432.88/x
  3. Step 3: Cross multiply
    20,384.56x = 28,132.88 × 11,432.88
  4. Step 4: Simplify right side
    20,384.56x = 321,639,841.09
  5. Step 5: Solve for x
    x = 321,639,841.09/20,384.56
  6. Step 6: Final answer
    x = 15,778.60

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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.