Home / 39,128.35-58,686.25-12,470.87

Finding the Fourth Proportional to 39,128.35, 58,686.25 and 12,470.87

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Solution

The fourth proportional to 39,128.35, 58,686.25 and 12,470.87 is: 18,704.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128.35 : 58,686.25 = 12,470.87 : x
  2. Step 2: Convert to fraction form
    39,128.35/58,686.25 = 12,470.87/x
  3. Step 3: Cross multiply
    39,128.35x = 58,686.25 × 12,470.87
  4. Step 4: Simplify right side
    39,128.35x = 731,868,594.54
  5. Step 5: Solve for x
    x = 731,868,594.54/39,128.35
  6. Step 6: Final answer
    x = 18,704.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.