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Finding the Fourth Proportional to 20,763, 31,154.22 and 9,079.56

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Solution

The fourth proportional to 20,763, 31,154.22 and 9,079.56 is: 13,623.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763 : 31,154.22 = 9,079.56 : x
  2. Step 2: Convert to fraction form
    20,763/31,154.22 = 9,079.56/x
  3. Step 3: Cross multiply
    20,763x = 31,154.22 × 9,079.56
  4. Step 4: Simplify right side
    20,763x = 282,866,609.74
  5. Step 5: Solve for x
    x = 282,866,609.74/20,763
  6. Step 6: Final answer
    x = 13,623.59

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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.