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Finding the Fourth Proportional to 18,159.78, 27,237.60 and 6,311.28

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Solution

The fourth proportional to 18,159.78, 27,237.60 and 6,311.28 is: 9,466.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,159.78 : 27,237.60 = 6,311.28 : x
  2. Step 2: Convert to fraction form
    18,159.78/27,237.60 = 6,311.28/x
  3. Step 3: Cross multiply
    18,159.78x = 27,237.60 × 6,311.28
  4. Step 4: Simplify right side
    18,159.78x = 171,904,120.13
  5. Step 5: Solve for x
    x = 171,904,120.13/18,159.78
  6. Step 6: Final answer
    x = 9,466.20

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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.