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Finding the Fourth Proportional to 9,335.78, 12,880.81 and 5,356.70

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Solution

The fourth proportional to 9,335.78, 12,880.81 and 5,356.70 is: 7,390.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,335.78 : 12,880.81 = 5,356.70 : x
  2. Step 2: Convert to fraction form
    9,335.78/12,880.81 = 5,356.70/x
  3. Step 3: Cross multiply
    9,335.78x = 12,880.81 × 5,356.70
  4. Step 4: Simplify right side
    9,335.78x = 68,998,634.93
  5. Step 5: Solve for x
    x = 68,998,634.93/9,335.78
  6. Step 6: Final answer
    x = 7,390.77

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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.