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Finding the Fourth Proportional to 18,393.78, 27,587.55 and 5,243.16

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Solution

The fourth proportional to 18,393.78, 27,587.55 and 5,243.16 is: 7,863.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.78 : 27,587.55 = 5,243.16 : x
  2. Step 2: Convert to fraction form
    18,393.78/27,587.55 = 5,243.16/x
  3. Step 3: Cross multiply
    18,393.78x = 27,587.55 × 5,243.16
  4. Step 4: Simplify right side
    18,393.78x = 144,645,938.66
  5. Step 5: Solve for x
    x = 144,645,938.66/18,393.78
  6. Step 6: Final answer
    x = 7,863.85

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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.