Home / 28,253.41-42,380.12-20,511.43

Finding the Fourth Proportional to 28,253.41, 42,380.12 and 20,511.43

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Solution

The fourth proportional to 28,253.41, 42,380.12 and 20,511.43 is: 30,767.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,253.41 : 42,380.12 = 20,511.43 : x
  2. Step 2: Convert to fraction form
    28,253.41/42,380.12 = 20,511.43/x
  3. Step 3: Cross multiply
    28,253.41x = 42,380.12 × 20,511.43
  4. Step 4: Simplify right side
    28,253.41x = 869,276,864.77
  5. Step 5: Solve for x
    x = 869,276,864.77/28,253.41
  6. Step 6: Final answer
    x = 30,767.15

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.