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Finding the Fourth Proportional to 18,600.71, 27,905.45 and 6,121.71

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Solution

The fourth proportional to 18,600.71, 27,905.45 and 6,121.71 is: 9,184.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,600.71 : 27,905.45 = 6,121.71 : x
  2. Step 2: Convert to fraction form
    18,600.71/27,905.45 = 6,121.71/x
  3. Step 3: Cross multiply
    18,600.71x = 27,905.45 × 6,121.71
  4. Step 4: Simplify right side
    18,600.71x = 170,829,041.71
  5. Step 5: Solve for x
    x = 170,829,041.71/18,600.71
  6. Step 6: Final answer
    x = 9,184.01

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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.