Home / 39,830.40-54,979.20-29,116.80

Finding the Fourth Proportional to 39,830.40, 54,979.20 and 29,116.80

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Solution

The fourth proportional to 39,830.40, 54,979.20 and 29,116.80 is: 40,190.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,830.40 : 54,979.20 = 29,116.80 : x
  2. Step 2: Convert to fraction form
    39,830.40/54,979.20 = 29,116.80/x
  3. Step 3: Cross multiply
    39,830.40x = 54,979.20 × 29,116.80
  4. Step 4: Simplify right side
    39,830.40x = 1,600,818,370.56
  5. Step 5: Solve for x
    x = 1,600,818,370.56/39,830.40
  6. Step 6: Final answer
    x = 40,190.87

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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.