Home / 20,711.26-31,066.90-12,393.70

Finding the Fourth Proportional to 20,711.26, 31,066.90 and 12,393.70

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Solution

The fourth proportional to 20,711.26, 31,066.90 and 12,393.70 is: 18,590.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.26 : 31,066.90 = 12,393.70 : x
  2. Step 2: Convert to fraction form
    20,711.26/31,066.90 = 12,393.70/x
  3. Step 3: Cross multiply
    20,711.26x = 31,066.90 × 12,393.70
  4. Step 4: Simplify right side
    20,711.26x = 385,033,838.53
  5. Step 5: Solve for x
    x = 385,033,838.53/20,711.26
  6. Step 6: Final answer
    x = 18,590.56

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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.