Home / 39,543.28-54,569.76-21,638.24

Finding the Fourth Proportional to 39,543.28, 54,569.76 and 21,638.24

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Solution

The fourth proportional to 39,543.28, 54,569.76 and 21,638.24 is: 29,860.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,543.28 : 54,569.76 = 21,638.24 : x
  2. Step 2: Convert to fraction form
    39,543.28/54,569.76 = 21,638.24/x
  3. Step 3: Cross multiply
    39,543.28x = 54,569.76 × 21,638.24
  4. Step 4: Simplify right side
    39,543.28x = 1,180,793,563.62
  5. Step 5: Solve for x
    x = 1,180,793,563.62/39,543.28
  6. Step 6: Final answer
    x = 29,860.79

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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.