Home / 39,685.20-54,765.34-21,535.53

Finding the Fourth Proportional to 39,685.20, 54,765.34 and 21,535.53

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Solution

The fourth proportional to 39,685.20, 54,765.34 and 21,535.53 is: 29,718.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,685.20 : 54,765.34 = 21,535.53 : x
  2. Step 2: Convert to fraction form
    39,685.20/54,765.34 = 21,535.53/x
  3. Step 3: Cross multiply
    39,685.20x = 54,765.34 × 21,535.53
  4. Step 4: Simplify right side
    39,685.20x = 1,179,400,622.53
  5. Step 5: Solve for x
    x = 1,179,400,622.53/39,685.20
  6. Step 6: Final answer
    x = 29,718.90

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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.