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Finding the Fourth Proportional to 18,356.48, 27,543.86 and 7,271.15

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Solution

The fourth proportional to 18,356.48, 27,543.86 and 7,271.15 is: 10,910.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.48 : 27,543.86 = 7,271.15 : x
  2. Step 2: Convert to fraction form
    18,356.48/27,543.86 = 7,271.15/x
  3. Step 3: Cross multiply
    18,356.48x = 27,543.86 × 7,271.15
  4. Step 4: Simplify right side
    18,356.48x = 200,275,606.50
  5. Step 5: Solve for x
    x = 200,275,606.50/18,356.48
  6. Step 6: Final answer
    x = 10,910.35

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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.