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Finding the Fourth Proportional to 12,658.68, 18,969.54 and 8,958.90

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Solution

The fourth proportional to 12,658.68, 18,969.54 and 8,958.90 is: 13,425.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.68 : 18,969.54 = 8,958.90 : x
  2. Step 2: Convert to fraction form
    12,658.68/18,969.54 = 8,958.90/x
  3. Step 3: Cross multiply
    12,658.68x = 18,969.54 × 8,958.90
  4. Step 4: Simplify right side
    12,658.68x = 169,946,211.91
  5. Step 5: Solve for x
    x = 169,946,211.91/12,658.68
  6. Step 6: Final answer
    x = 13,425.27

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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.