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Finding the Fourth Proportional to 18,139.54, 25,039.65 and 17,640.22

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Solution

The fourth proportional to 18,139.54, 25,039.65 and 17,640.22 is: 24,350.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.54 : 25,039.65 = 17,640.22 : x
  2. Step 2: Convert to fraction form
    18,139.54/25,039.65 = 17,640.22/x
  3. Step 3: Cross multiply
    18,139.54x = 25,039.65 × 17,640.22
  4. Step 4: Simplify right side
    18,139.54x = 441,704,934.72
  5. Step 5: Solve for x
    x = 441,704,934.72/18,139.54
  6. Step 6: Final answer
    x = 24,350.39

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1.5x scale

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.