Home / 57,917.52-86,859-20,470.68

Finding the Fourth Proportional to 57,917.52, 86,859 and 20,470.68

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Solution

The fourth proportional to 57,917.52, 86,859 and 20,470.68 is: 30,699.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,917.52 : 86,859 = 20,470.68 : x
  2. Step 2: Convert to fraction form
    57,917.52/86,859 = 20,470.68/x
  3. Step 3: Cross multiply
    57,917.52x = 86,859 × 20,470.68
  4. Step 4: Simplify right side
    57,917.52x = 1,778,062,794.12
  5. Step 5: Solve for x
    x = 1,778,062,794.12/57,917.52
  6. Step 6: Final answer
    x = 30,699.91

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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.