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Finding the Fourth Proportional to 8,619.55, 11,892.42 and 5,218.16

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Solution

The fourth proportional to 8,619.55, 11,892.42 and 5,218.16 is: 7,199.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.55 : 11,892.42 = 5,218.16 : x
  2. Step 2: Convert to fraction form
    8,619.55/11,892.42 = 5,218.16/x
  3. Step 3: Cross multiply
    8,619.55x = 11,892.42 × 5,218.16
  4. Step 4: Simplify right side
    8,619.55x = 62,056,490.89
  5. Step 5: Solve for x
    x = 62,056,490.89/8,619.55
  6. Step 6: Final answer
    x = 7,199.51

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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.