Home / 25,981.80-38,972.70-18,108.60

Finding the Fourth Proportional to 25,981.80, 38,972.70 and 18,108.60

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Solution

The fourth proportional to 25,981.80, 38,972.70 and 18,108.60 is: 27,162.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,981.80 : 38,972.70 = 18,108.60 : x
  2. Step 2: Convert to fraction form
    25,981.80/38,972.70 = 18,108.60/x
  3. Step 3: Cross multiply
    25,981.80x = 38,972.70 × 18,108.60
  4. Step 4: Simplify right side
    25,981.80x = 705,741,035.22
  5. Step 5: Solve for x
    x = 705,741,035.22/25,981.80
  6. Step 6: Final answer
    x = 27,162.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.