Home / 39,439.18-54,427.37-21,535.55

Finding the Fourth Proportional to 39,439.18, 54,427.37 and 21,535.55

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Solution

The fourth proportional to 39,439.18, 54,427.37 and 21,535.55 is: 29,719.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,439.18 : 54,427.37 = 21,535.55 : x
  2. Step 2: Convert to fraction form
    39,439.18/54,427.37 = 21,535.55/x
  3. Step 3: Cross multiply
    39,439.18x = 54,427.37 × 21,535.55
  4. Step 4: Simplify right side
    39,439.18x = 1,172,123,348.00
  5. Step 5: Solve for x
    x = 1,172,123,348.00/39,439.18
  6. Step 6: Final answer
    x = 29,719.77

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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.