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Finding the Fourth Proportional to 18,648.40, 27,972.78 and 5,501.02

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Solution

The fourth proportional to 18,648.40, 27,972.78 and 5,501.02 is: 8,251.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.40 : 27,972.78 = 5,501.02 : x
  2. Step 2: Convert to fraction form
    18,648.40/27,972.78 = 5,501.02/x
  3. Step 3: Cross multiply
    18,648.40x = 27,972.78 × 5,501.02
  4. Step 4: Simplify right side
    18,648.40x = 153,878,822.24
  5. Step 5: Solve for x
    x = 153,878,822.24/18,648.40
  6. Step 6: Final answer
    x = 8,251.58

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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.