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Finding the Fourth Proportional to 13,324.80, 20,010.88 and 12,644.16

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Solution

The fourth proportional to 13,324.80, 20,010.88 and 12,644.16 is: 18,988.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,324.80 : 20,010.88 = 12,644.16 : x
  2. Step 2: Convert to fraction form
    13,324.80/20,010.88 = 12,644.16/x
  3. Step 3: Cross multiply
    13,324.80x = 20,010.88 × 12,644.16
  4. Step 4: Simplify right side
    13,324.80x = 253,020,768.46
  5. Step 5: Solve for x
    x = 253,020,768.46/13,324.80
  6. Step 6: Final answer
    x = 18,988.71

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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.