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Finding the Fourth Proportional to 8,892.75, 12,268.56 and 5,115.32

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Solution

The fourth proportional to 8,892.75, 12,268.56 and 5,115.32 is: 7,057.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,892.75 : 12,268.56 = 5,115.32 : x
  2. Step 2: Convert to fraction form
    8,892.75/12,268.56 = 5,115.32/x
  3. Step 3: Cross multiply
    8,892.75x = 12,268.56 × 5,115.32
  4. Step 4: Simplify right side
    8,892.75x = 62,757,579.67
  5. Step 5: Solve for x
    x = 62,757,579.67/8,892.75
  6. Step 6: Final answer
    x = 7,057.16

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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.