Home / 20,680.90-30,972.87-15,120.22

Finding the Fourth Proportional to 20,680.90, 30,972.87 and 15,120.22

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Solution

The fourth proportional to 20,680.90, 30,972.87 and 15,120.22 is: 22,644.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.90 : 30,972.87 = 15,120.22 : x
  2. Step 2: Convert to fraction form
    20,680.90/30,972.87 = 15,120.22/x
  3. Step 3: Cross multiply
    20,680.90x = 30,972.87 × 15,120.22
  4. Step 4: Simplify right side
    20,680.90x = 468,316,608.43
  5. Step 5: Solve for x
    x = 468,316,608.43/20,680.90
  6. Step 6: Final answer
    x = 22,644.89

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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.