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Finding the Fourth Proportional to 18,708.80, 25,818.52 and 10,325.28

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Solution

The fourth proportional to 18,708.80, 25,818.52 and 10,325.28 is: 14,249.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,708.80 : 25,818.52 = 10,325.28 : x
  2. Step 2: Convert to fraction form
    18,708.80/25,818.52 = 10,325.28/x
  3. Step 3: Cross multiply
    18,708.80x = 25,818.52 × 10,325.28
  4. Step 4: Simplify right side
    18,708.80x = 266,583,448.19
  5. Step 5: Solve for x
    x = 266,583,448.19/18,708.80
  6. Step 6: Final answer
    x = 14,249.09

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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.