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Finding the Fourth Proportional to 21,340.80, 32,020.80 and 10,243.20

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Solution

The fourth proportional to 21,340.80, 32,020.80 and 10,243.20 is: 15,369.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.80 : 32,020.80 = 10,243.20 : x
  2. Step 2: Convert to fraction form
    21,340.80/32,020.80 = 10,243.20/x
  3. Step 3: Cross multiply
    21,340.80x = 32,020.80 × 10,243.20
  4. Step 4: Simplify right side
    21,340.80x = 327,995,458.56
  5. Step 5: Solve for x
    x = 327,995,458.56/21,340.80
  6. Step 6: Final answer
    x = 15,369.41

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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.