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Finding the Fourth Proportional to 18,701.88, 28,047.06 and 6,387

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Solution

The fourth proportional to 18,701.88, 28,047.06 and 6,387 is: 9,578.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.88 : 28,047.06 = 6,387 : x
  2. Step 2: Convert to fraction form
    18,701.88/28,047.06 = 6,387/x
  3. Step 3: Cross multiply
    18,701.88x = 28,047.06 × 6,387
  4. Step 4: Simplify right side
    18,701.88x = 179,136,572.22
  5. Step 5: Solve for x
    x = 179,136,572.22/18,701.88
  6. Step 6: Final answer
    x = 9,578.53

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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.