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Finding the Fourth Proportional to 28,057.42, 42,078.90 and 8,331.52

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Solution

The fourth proportional to 28,057.42, 42,078.90 and 8,331.52 is: 12,495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,057.42 : 42,078.90 = 8,331.52 : x
  2. Step 2: Convert to fraction form
    28,057.42/42,078.90 = 8,331.52/x
  3. Step 3: Cross multiply
    28,057.42x = 42,078.90 × 8,331.52
  4. Step 4: Simplify right side
    28,057.42x = 350,581,196.93
  5. Step 5: Solve for x
    x = 350,581,196.93/28,057.42
  6. Step 6: Final answer
    x = 12,495.13

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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.