Home / 20,707.26-31,060.90-12,389.70

Finding the Fourth Proportional to 20,707.26, 31,060.90 and 12,389.70

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Solution

The fourth proportional to 20,707.26, 31,060.90 and 12,389.70 is: 18,584.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,707.26 : 31,060.90 = 12,389.70 : x
  2. Step 2: Convert to fraction form
    20,707.26/31,060.90 = 12,389.70/x
  3. Step 3: Cross multiply
    20,707.26x = 31,060.90 × 12,389.70
  4. Step 4: Simplify right side
    20,707.26x = 384,835,232.73
  5. Step 5: Solve for x
    x = 384,835,232.73/20,707.26
  6. Step 6: Final answer
    x = 18,584.56

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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.