Home / 39,543.13-54,569.52-21,638.28

Finding the Fourth Proportional to 39,543.13, 54,569.52 and 21,638.28

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Solution

The fourth proportional to 39,543.13, 54,569.52 and 21,638.28 is: 29,860.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,543.13 : 54,569.52 = 21,638.28 : x
  2. Step 2: Convert to fraction form
    39,543.13/54,569.52 = 21,638.28/x
  3. Step 3: Cross multiply
    39,543.13x = 54,569.52 × 21,638.28
  4. Step 4: Simplify right side
    39,543.13x = 1,180,790,553.23
  5. Step 5: Solve for x
    x = 1,180,790,553.23/39,543.13
  6. Step 6: Final answer
    x = 29,860.83

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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.