Home / 20,722.32-31,045.14-15,178.14

Finding the Fourth Proportional to 20,722.32, 31,045.14 and 15,178.14

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Solution

The fourth proportional to 20,722.32, 31,045.14 and 15,178.14 is: 22,739.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.32 : 31,045.14 = 15,178.14 : x
  2. Step 2: Convert to fraction form
    20,722.32/31,045.14 = 15,178.14/x
  3. Step 3: Cross multiply
    20,722.32x = 31,045.14 × 15,178.14
  4. Step 4: Simplify right side
    20,722.32x = 471,207,481.24
  5. Step 5: Solve for x
    x = 471,207,481.24/20,722.32
  6. Step 6: Final answer
    x = 22,739.13

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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.