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Finding the Fourth Proportional to 13,381.65, 20,061.17 and 8,440.41

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Solution

The fourth proportional to 13,381.65, 20,061.17 and 8,440.41 is: 12,653.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,381.65 : 20,061.17 = 8,440.41 : x
  2. Step 2: Convert to fraction form
    13,381.65/20,061.17 = 8,440.41/x
  3. Step 3: Cross multiply
    13,381.65x = 20,061.17 × 8,440.41
  4. Step 4: Simplify right side
    13,381.65x = 169,324,564.56
  5. Step 5: Solve for x
    x = 169,324,564.56/13,381.65
  6. Step 6: Final answer
    x = 12,653.49

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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.