Home / 22,287.20-30,748.75-12,720.24

Finding the Fourth Proportional to 22,287.20, 30,748.75 and 12,720.24

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Solution

The fourth proportional to 22,287.20, 30,748.75 and 12,720.24 is: 17,549.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,287.20 : 30,748.75 = 12,720.24 : x
  2. Step 2: Convert to fraction form
    22,287.20/30,748.75 = 12,720.24/x
  3. Step 3: Cross multiply
    22,287.20x = 30,748.75 × 12,720.24
  4. Step 4: Simplify right side
    22,287.20x = 391,131,479.70
  5. Step 5: Solve for x
    x = 391,131,479.70/22,287.20
  6. Step 6: Final answer
    x = 17,549.60

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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.