Home / 39,280.12-54,206.56-21,375.20

Finding the Fourth Proportional to 39,280.12, 54,206.56 and 21,375.20

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Solution

The fourth proportional to 39,280.12, 54,206.56 and 21,375.20 is: 29,497.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,280.12 : 54,206.56 = 21,375.20 : x
  2. Step 2: Convert to fraction form
    39,280.12/54,206.56 = 21,375.20/x
  3. Step 3: Cross multiply
    39,280.12x = 54,206.56 × 21,375.20
  4. Step 4: Simplify right side
    39,280.12x = 1,158,676,061.31
  5. Step 5: Solve for x
    x = 1,158,676,061.31/39,280.12
  6. Step 6: Final answer
    x = 29,497.77

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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.