Home / 20,793.16-31,190.86-8,315.08

Finding the Fourth Proportional to 20,793.16, 31,190.86 and 8,315.08

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Solution

The fourth proportional to 20,793.16, 31,190.86 and 8,315.08 is: 12,473.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.16 : 31,190.86 = 8,315.08 : x
  2. Step 2: Convert to fraction form
    20,793.16/31,190.86 = 8,315.08/x
  3. Step 3: Cross multiply
    20,793.16x = 31,190.86 × 8,315.08
  4. Step 4: Simplify right side
    20,793.16x = 259,354,496.17
  5. Step 5: Solve for x
    x = 259,354,496.17/20,793.16
  6. Step 6: Final answer
    x = 12,473.07

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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.