Home / 39,418.39-54,397.55-21,513.78

Finding the Fourth Proportional to 39,418.39, 54,397.55 and 21,513.78

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Solution

The fourth proportional to 39,418.39, 54,397.55 and 21,513.78 is: 29,689.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,418.39 : 54,397.55 = 21,513.78 : x
  2. Step 2: Convert to fraction form
    39,418.39/54,397.55 = 21,513.78/x
  3. Step 3: Cross multiply
    39,418.39x = 54,397.55 × 21,513.78
  4. Step 4: Simplify right side
    39,418.39x = 1,170,296,923.24
  5. Step 5: Solve for x
    x = 1,170,296,923.24/39,418.39
  6. Step 6: Final answer
    x = 29,689.11

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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.