Home / 20,781.60-31,166.64-5,986.52

Finding the Fourth Proportional to 20,781.60, 31,166.64 and 5,986.52

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Solution

The fourth proportional to 20,781.60, 31,166.64 and 5,986.52 is: 8,978.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.60 : 31,166.64 = 5,986.52 : x
  2. Step 2: Convert to fraction form
    20,781.60/31,166.64 = 5,986.52/x
  3. Step 3: Cross multiply
    20,781.60x = 31,166.64 × 5,986.52
  4. Step 4: Simplify right side
    20,781.60x = 186,579,713.69
  5. Step 5: Solve for x
    x = 186,579,713.69/20,781.60
  6. Step 6: Final answer
    x = 8,978.12

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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.