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Finding the Fourth Proportional to 7,874.30, 10,867.15 and 4,338.15

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Solution

The fourth proportional to 7,874.30, 10,867.15 and 4,338.15 is: 5,986.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,874.30 : 10,867.15 = 4,338.15 : x
  2. Step 2: Convert to fraction form
    7,874.30/10,867.15 = 4,338.15/x
  3. Step 3: Cross multiply
    7,874.30x = 10,867.15 × 4,338.15
  4. Step 4: Simplify right side
    7,874.30x = 47,143,261.59
  5. Step 5: Solve for x
    x = 47,143,261.59/7,874.30
  6. Step 6: Final answer
    x = 5,986.98

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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.