Home / 39,434.78-54,419.24-21,529.90

Finding the Fourth Proportional to 39,434.78, 54,419.24 and 21,529.90

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Solution

The fourth proportional to 39,434.78, 54,419.24 and 21,529.90 is: 29,710.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,434.78 : 54,419.24 = 21,529.90 : x
  2. Step 2: Convert to fraction form
    39,434.78/54,419.24 = 21,529.90/x
  3. Step 3: Cross multiply
    39,434.78x = 54,419.24 × 21,529.90
  4. Step 4: Simplify right side
    39,434.78x = 1,171,640,917.12
  5. Step 5: Solve for x
    x = 1,171,640,917.12/39,434.78
  6. Step 6: Final answer
    x = 29,710.85

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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.