Home / 20,722.01-31,114.17-12,439.08

Finding the Fourth Proportional to 20,722.01, 31,114.17 and 12,439.08

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Solution

The fourth proportional to 20,722.01, 31,114.17 and 12,439.08 is: 18,677.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.01 : 31,114.17 = 12,439.08 : x
  2. Step 2: Convert to fraction form
    20,722.01/31,114.17 = 12,439.08/x
  3. Step 3: Cross multiply
    20,722.01x = 31,114.17 × 12,439.08
  4. Step 4: Simplify right side
    20,722.01x = 387,031,649.76
  5. Step 5: Solve for x
    x = 387,031,649.76/20,722.01
  6. Step 6: Final answer
    x = 18,677.33

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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.