Home / 20,876.58-31,287.60-18,237.74

Finding the Fourth Proportional to 20,876.58, 31,287.60 and 18,237.74

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Solution

The fourth proportional to 20,876.58, 31,287.60 and 18,237.74 is: 27,332.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.58 : 31,287.60 = 18,237.74 : x
  2. Step 2: Convert to fraction form
    20,876.58/31,287.60 = 18,237.74/x
  3. Step 3: Cross multiply
    20,876.58x = 31,287.60 × 18,237.74
  4. Step 4: Simplify right side
    20,876.58x = 570,614,957.59
  5. Step 5: Solve for x
    x = 570,614,957.59/20,876.58
  6. Step 6: Final answer
    x = 27,332.78

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1.5x scale

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.