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Finding the Fourth Proportional to 18,699.80, 25,802.28 and 10,742.36

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Solution

The fourth proportional to 18,699.80, 25,802.28 and 10,742.36 is: 14,822.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,699.80 : 25,802.28 = 10,742.36 : x
  2. Step 2: Convert to fraction form
    18,699.80/25,802.28 = 10,742.36/x
  3. Step 3: Cross multiply
    18,699.80x = 25,802.28 × 10,742.36
  4. Step 4: Simplify right side
    18,699.80x = 277,177,251.57
  5. Step 5: Solve for x
    x = 277,177,251.57/18,699.80
  6. Step 6: Final answer
    x = 14,822.48

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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.