Home / 20,721.20-31,096.20-9,042.80

Finding the Fourth Proportional to 20,721.20, 31,096.20 and 9,042.80

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Solution

The fourth proportional to 20,721.20, 31,096.20 and 9,042.80 is: 13,570.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.20 : 31,096.20 = 9,042.80 : x
  2. Step 2: Convert to fraction form
    20,721.20/31,096.20 = 9,042.80/x
  3. Step 3: Cross multiply
    20,721.20x = 31,096.20 × 9,042.80
  4. Step 4: Simplify right side
    20,721.20x = 281,196,717.36
  5. Step 5: Solve for x
    x = 281,196,717.36/20,721.20
  6. Step 6: Final answer
    x = 13,570.48

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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.