Home / 22,255.20-30,723.12-15,218.40

Finding the Fourth Proportional to 22,255.20, 30,723.12 and 15,218.40

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Solution

The fourth proportional to 22,255.20, 30,723.12 and 15,218.40 is: 21,008.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,255.20 : 30,723.12 = 15,218.40 : x
  2. Step 2: Convert to fraction form
    22,255.20/30,723.12 = 15,218.40/x
  3. Step 3: Cross multiply
    22,255.20x = 30,723.12 × 15,218.40
  4. Step 4: Simplify right side
    22,255.20x = 467,556,729.41
  5. Step 5: Solve for x
    x = 467,556,729.41/22,255.20
  6. Step 6: Final answer
    x = 21,008.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.