Home / 39,438.78-54,425.68-21,534.18

Finding the Fourth Proportional to 39,438.78, 54,425.68 and 21,534.18

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Solution

The fourth proportional to 39,438.78, 54,425.68 and 21,534.18 is: 29,717.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,438.78 : 54,425.68 = 21,534.18 : x
  2. Step 2: Convert to fraction form
    39,438.78/54,425.68 = 21,534.18/x
  3. Step 3: Cross multiply
    39,438.78x = 54,425.68 × 21,534.18
  4. Step 4: Simplify right side
    39,438.78x = 1,172,012,389.74
  5. Step 5: Solve for x
    x = 1,172,012,389.74/39,438.78
  6. Step 6: Final answer
    x = 29,717.26

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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.