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Finding the Fourth Proportional to 18,569.79, 27,859.55 and 5,422.28

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Solution

The fourth proportional to 18,569.79, 27,859.55 and 5,422.28 is: 8,134.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,569.79 : 27,859.55 = 5,422.28 : x
  2. Step 2: Convert to fraction form
    18,569.79/27,859.55 = 5,422.28/x
  3. Step 3: Cross multiply
    18,569.79x = 27,859.55 × 5,422.28
  4. Step 4: Simplify right side
    18,569.79x = 151,062,114.36
  5. Step 5: Solve for x
    x = 151,062,114.36/18,569.79
  6. Step 6: Final answer
    x = 8,134.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.