Home / 39,223.68-54,129-21,318.69

Finding the Fourth Proportional to 39,223.68, 54,129 and 21,318.69

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Solution

The fourth proportional to 39,223.68, 54,129 and 21,318.69 is: 29,419.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,223.68 : 54,129 = 21,318.69 : x
  2. Step 2: Convert to fraction form
    39,223.68/54,129 = 21,318.69/x
  3. Step 3: Cross multiply
    39,223.68x = 54,129 × 21,318.69
  4. Step 4: Simplify right side
    39,223.68x = 1,153,959,371.01
  5. Step 5: Solve for x
    x = 1,153,959,371.01/39,223.68
  6. Step 6: Final answer
    x = 29,419.97

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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.