Home / 39,223.50-54,128.10-21,318.61

Finding the Fourth Proportional to 39,223.50, 54,128.10 and 21,318.61

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Solution

The fourth proportional to 39,223.50, 54,128.10 and 21,318.61 is: 29,419.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,223.50 : 54,128.10 = 21,318.61 : x
  2. Step 2: Convert to fraction form
    39,223.50/54,128.10 = 21,318.61/x
  3. Step 3: Cross multiply
    39,223.50x = 54,128.10 × 21,318.61
  4. Step 4: Simplify right side
    39,223.50x = 1,153,935,853.94
  5. Step 5: Solve for x
    x = 1,153,935,853.94/39,223.50
  6. Step 6: Final answer
    x = 29,419.50

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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.