Home / 20,255.90-30,392.97-7,117.70

Finding the Fourth Proportional to 20,255.90, 30,392.97 and 7,117.70

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Solution

The fourth proportional to 20,255.90, 30,392.97 and 7,117.70 is: 10,679.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.90 : 30,392.97 = 7,117.70 : x
  2. Step 2: Convert to fraction form
    20,255.90/30,392.97 = 7,117.70/x
  3. Step 3: Cross multiply
    20,255.90x = 30,392.97 × 7,117.70
  4. Step 4: Simplify right side
    20,255.90x = 216,328,006.98
  5. Step 5: Solve for x
    x = 216,328,006.98/20,255.90
  6. Step 6: Final answer
    x = 10,679.75

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1.5x scale

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.