Home / 5,280.20-7,281.69-3,938.77

Finding the Fourth Proportional to 5,280.20, 7,281.69 and 3,938.77

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Solution

The fourth proportional to 5,280.20, 7,281.69 and 3,938.77 is: 5,431.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.20 : 7,281.69 = 3,938.77 : x
  2. Step 2: Convert to fraction form
    5,280.20/7,281.69 = 3,938.77/x
  3. Step 3: Cross multiply
    5,280.20x = 7,281.69 × 3,938.77
  4. Step 4: Simplify right side
    5,280.20x = 28,680,902.12
  5. Step 5: Solve for x
    x = 28,680,902.12/5,280.20
  6. Step 6: Final answer
    x = 5,431.78

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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.