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Finding the Fourth Proportional to 8,791.72, 12,126.98 and 6,138.16

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Solution

The fourth proportional to 8,791.72, 12,126.98 and 6,138.16 is: 8,466.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.72 : 12,126.98 = 6,138.16 : x
  2. Step 2: Convert to fraction form
    8,791.72/12,126.98 = 6,138.16/x
  3. Step 3: Cross multiply
    8,791.72x = 12,126.98 × 6,138.16
  4. Step 4: Simplify right side
    8,791.72x = 74,437,312.87
  5. Step 5: Solve for x
    x = 74,437,312.87/8,791.72
  6. Step 6: Final answer
    x = 8,466.75

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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.