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Finding the Fourth Proportional to 18,701.70, 25,810.62 and 10,743.90

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Solution

The fourth proportional to 18,701.70, 25,810.62 and 10,743.90 is: 14,827.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,701.70 : 25,810.62 = 10,743.90 : x
  2. Step 2: Convert to fraction form
    18,701.70/25,810.62 = 10,743.90/x
  3. Step 3: Cross multiply
    18,701.70x = 25,810.62 × 10,743.90
  4. Step 4: Simplify right side
    18,701.70x = 277,306,720.22
  5. Step 5: Solve for x
    x = 277,306,720.22/18,701.70
  6. Step 6: Final answer
    x = 14,827.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.