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Finding the Fourth Proportional to 18,710.97, 25,821.60 and 11,158.77

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Solution

The fourth proportional to 18,710.97, 25,821.60 and 11,158.77 is: 15,399.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.97 : 25,821.60 = 11,158.77 : x
  2. Step 2: Convert to fraction form
    18,710.97/25,821.60 = 11,158.77/x
  3. Step 3: Cross multiply
    18,710.97x = 25,821.60 × 11,158.77
  4. Step 4: Simplify right side
    18,710.97x = 288,137,295.43
  5. Step 5: Solve for x
    x = 288,137,295.43/18,710.97
  6. Step 6: Final answer
    x = 15,399.38

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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.