Home / 20,844.20-31,247.34-7,687.40

Finding the Fourth Proportional to 20,844.20, 31,247.34 and 7,687.40

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Solution

The fourth proportional to 20,844.20, 31,247.34 and 7,687.40 is: 11,524.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,844.20 : 31,247.34 = 7,687.40 : x
  2. Step 2: Convert to fraction form
    20,844.20/31,247.34 = 7,687.40/x
  3. Step 3: Cross multiply
    20,844.20x = 31,247.34 × 7,687.40
  4. Step 4: Simplify right side
    20,844.20x = 240,210,801.52
  5. Step 5: Solve for x
    x = 240,210,801.52/20,844.20
  6. Step 6: Final answer
    x = 11,524.11

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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.