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Finding the Fourth Proportional to 9,330.78, 12,872.31 and 5,351.10

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Solution

The fourth proportional to 9,330.78, 12,872.31 and 5,351.10 is: 7,382.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,330.78 : 12,872.31 = 5,351.10 : x
  2. Step 2: Convert to fraction form
    9,330.78/12,872.31 = 5,351.10/x
  3. Step 3: Cross multiply
    9,330.78x = 12,872.31 × 5,351.10
  4. Step 4: Simplify right side
    9,330.78x = 68,881,018.04
  5. Step 5: Solve for x
    x = 68,881,018.04/9,330.78
  6. Step 6: Final answer
    x = 7,382.13

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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.