Home / 39,417.39-54,396.17-21,512.78

Finding the Fourth Proportional to 39,417.39, 54,396.17 and 21,512.78

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Solution

The fourth proportional to 39,417.39, 54,396.17 and 21,512.78 is: 29,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,417.39 : 54,396.17 = 21,512.78 : x
  2. Step 2: Convert to fraction form
    39,417.39/54,396.17 = 21,512.78/x
  3. Step 3: Cross multiply
    39,417.39x = 54,396.17 × 21,512.78
  4. Step 4: Simplify right side
    39,417.39x = 1,170,212,458.51
  5. Step 5: Solve for x
    x = 1,170,212,458.51/39,417.39
  6. Step 6: Final answer
    x = 29,687.72

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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.