Home / 20,934.42-31,391.70-8,117.57

Finding the Fourth Proportional to 20,934.42, 31,391.70 and 8,117.57

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Solution

The fourth proportional to 20,934.42, 31,391.70 and 8,117.57 is: 12,172.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.42 : 31,391.70 = 8,117.57 : x
  2. Step 2: Convert to fraction form
    20,934.42/31,391.70 = 8,117.57/x
  3. Step 3: Cross multiply
    20,934.42x = 31,391.70 × 8,117.57
  4. Step 4: Simplify right side
    20,934.42x = 254,824,370.21
  5. Step 5: Solve for x
    x = 254,824,370.21/20,934.42
  6. Step 6: Final answer
    x = 12,172.51

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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.