Home / 25,679.79-35,440.74-18,515.61

Finding the Fourth Proportional to 25,679.79, 35,440.74 and 18,515.61

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Solution

The fourth proportional to 25,679.79, 35,440.74 and 18,515.61 is: 25,553.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,679.79 : 35,440.74 = 18,515.61 : x
  2. Step 2: Convert to fraction form
    25,679.79/35,440.74 = 18,515.61/x
  3. Step 3: Cross multiply
    25,679.79x = 35,440.74 × 18,515.61
  4. Step 4: Simplify right side
    25,679.79x = 656,206,919.95
  5. Step 5: Solve for x
    x = 656,206,919.95/25,679.79
  6. Step 6: Final answer
    x = 25,553.44

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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.