Home / 28,239.57-42,363.03-8,520.12

Finding the Fourth Proportional to 28,239.57, 42,363.03 and 8,520.12

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Solution

The fourth proportional to 28,239.57, 42,363.03 and 8,520.12 is: 12,781.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.57 : 42,363.03 = 8,520.12 : x
  2. Step 2: Convert to fraction form
    28,239.57/42,363.03 = 8,520.12/x
  3. Step 3: Cross multiply
    28,239.57x = 42,363.03 × 8,520.12
  4. Step 4: Simplify right side
    28,239.57x = 360,938,099.16
  5. Step 5: Solve for x
    x = 360,938,099.16/28,239.57
  6. Step 6: Final answer
    x = 12,781.29

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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.