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Finding the Fourth Proportional to 9,138.87, 12,612.38 and 7,265.91

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Solution

The fourth proportional to 9,138.87, 12,612.38 and 7,265.91 is: 10,027.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.87 : 12,612.38 = 7,265.91 : x
  2. Step 2: Convert to fraction form
    9,138.87/12,612.38 = 7,265.91/x
  3. Step 3: Cross multiply
    9,138.87x = 12,612.38 × 7,265.91
  4. Step 4: Simplify right side
    9,138.87x = 91,640,381.64
  5. Step 5: Solve for x
    x = 91,640,381.64/9,138.87
  6. Step 6: Final answer
    x = 10,027.54

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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.