Home / 20,865.80-31,230.97-15,317.91

Finding the Fourth Proportional to 20,865.80, 31,230.97 and 15,317.91

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Solution

The fourth proportional to 20,865.80, 31,230.97 and 15,317.91 is: 22,927.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865.80 : 31,230.97 = 15,317.91 : x
  2. Step 2: Convert to fraction form
    20,865.80/31,230.97 = 15,317.91/x
  3. Step 3: Cross multiply
    20,865.80x = 31,230.97 × 15,317.91
  4. Step 4: Simplify right side
    20,865.80x = 478,393,149.38
  5. Step 5: Solve for x
    x = 478,393,149.38/20,865.80
  6. Step 6: Final answer
    x = 22,927.14

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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.