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Finding the Fourth Proportional to 13,839.10, 20,758.58 and 8,294.10

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Solution

The fourth proportional to 13,839.10, 20,758.58 and 8,294.10 is: 12,441.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.10 : 20,758.58 = 8,294.10 : x
  2. Step 2: Convert to fraction form
    13,839.10/20,758.58 = 8,294.10/x
  3. Step 3: Cross multiply
    13,839.10x = 20,758.58 × 8,294.10
  4. Step 4: Simplify right side
    13,839.10x = 172,173,738.38
  5. Step 5: Solve for x
    x = 172,173,738.38/13,839.10
  6. Step 6: Final answer
    x = 12,441.11

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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.