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Finding the Fourth Proportional to 7,874.40, 10,868.16 and 4,891.44

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Solution

The fourth proportional to 7,874.40, 10,868.16 and 4,891.44 is: 6,751.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.40 : 10,868.16 = 4,891.44 : x
  2. Step 2: Convert to fraction form
    7,874.40/10,868.16 = 4,891.44/x
  3. Step 3: Cross multiply
    7,874.40x = 10,868.16 × 4,891.44
  4. Step 4: Simplify right side
    7,874.40x = 53,160,952.55
  5. Step 5: Solve for x
    x = 53,160,952.55/7,874.40
  6. Step 6: Final answer
    x = 6,751.11

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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.