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Finding the Fourth Proportional to 13,842.69, 20,760.99 and 6,440.10

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Solution

The fourth proportional to 13,842.69, 20,760.99 and 6,440.10 is: 9,658.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,842.69 : 20,760.99 = 6,440.10 : x
  2. Step 2: Convert to fraction form
    13,842.69/20,760.99 = 6,440.10/x
  3. Step 3: Cross multiply
    13,842.69x = 20,760.99 × 6,440.10
  4. Step 4: Simplify right side
    13,842.69x = 133,702,851.70
  5. Step 5: Solve for x
    x = 133,702,851.70/13,842.69
  6. Step 6: Final answer
    x = 9,658.73

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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.