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Finding the Fourth Proportional to 8,942.70, 12,352.95 and 6,872.70

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Solution

The fourth proportional to 8,942.70, 12,352.95 and 6,872.70 is: 9,493.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,942.70 : 12,352.95 = 6,872.70 : x
  2. Step 2: Convert to fraction form
    8,942.70/12,352.95 = 6,872.70/x
  3. Step 3: Cross multiply
    8,942.70x = 12,352.95 × 6,872.70
  4. Step 4: Simplify right side
    8,942.70x = 84,898,119.47
  5. Step 5: Solve for x
    x = 84,898,119.47/8,942.70
  6. Step 6: Final answer
    x = 9,493.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.