Home / 39,223.80-54,129.20-21,318.86

Finding the Fourth Proportional to 39,223.80, 54,129.20 and 21,318.86

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Solution

The fourth proportional to 39,223.80, 54,129.20 and 21,318.86 is: 29,420.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,223.80 : 54,129.20 = 21,318.86 : x
  2. Step 2: Convert to fraction form
    39,223.80/54,129.20 = 21,318.86/x
  3. Step 3: Cross multiply
    39,223.80x = 54,129.20 × 21,318.86
  4. Step 4: Simplify right side
    39,223.80x = 1,153,972,836.71
  5. Step 5: Solve for x
    x = 1,153,972,836.71/39,223.80
  6. Step 6: Final answer
    x = 29,420.22

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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.