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Finding the Fourth Proportional to 18,706, 28,017.80 and 15,463.48

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Solution

The fourth proportional to 18,706, 28,017.80 and 15,463.48 is: 23,161.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706 : 28,017.80 = 15,463.48 : x
  2. Step 2: Convert to fraction form
    18,706/28,017.80 = 15,463.48/x
  3. Step 3: Cross multiply
    18,706x = 28,017.80 × 15,463.48
  4. Step 4: Simplify right side
    18,706x = 433,252,689.94
  5. Step 5: Solve for x
    x = 433,252,689.94/18,706
  6. Step 6: Final answer
    x = 23,161.16

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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.