Home / 39,228.90-54,133.62-21,323.76

Finding the Fourth Proportional to 39,228.90, 54,133.62 and 21,323.76

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Solution

The fourth proportional to 39,228.90, 54,133.62 and 21,323.76 is: 29,425.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,228.90 : 54,133.62 = 21,323.76 : x
  2. Step 2: Convert to fraction form
    39,228.90/54,133.62 = 21,323.76/x
  3. Step 3: Cross multiply
    39,228.90x = 54,133.62 × 21,323.76
  4. Step 4: Simplify right side
    39,228.90x = 1,154,332,320.81
  5. Step 5: Solve for x
    x = 1,154,332,320.81/39,228.90
  6. Step 6: Final answer
    x = 29,425.56

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Double scale
Find fourth proportional to 39,229.90, 54,135 and 21,324.76
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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.