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Finding the Fourth Proportional to 18,287.78, 27,431.67 and 4,436.78

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Solution

The fourth proportional to 18,287.78, 27,431.67 and 4,436.78 is: 6,655.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.78 : 27,431.67 = 4,436.78 : x
  2. Step 2: Convert to fraction form
    18,287.78/27,431.67 = 4,436.78/x
  3. Step 3: Cross multiply
    18,287.78x = 27,431.67 × 4,436.78
  4. Step 4: Simplify right side
    18,287.78x = 121,708,284.82
  5. Step 5: Solve for x
    x = 121,708,284.82/18,287.78
  6. Step 6: Final answer
    x = 6,655.17

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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.