Home / 20,876.16-31,315.72-8,396.25

Finding the Fourth Proportional to 20,876.16, 31,315.72 and 8,396.25

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Solution

The fourth proportional to 20,876.16, 31,315.72 and 8,396.25 is: 12,594.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.16 : 31,315.72 = 8,396.25 : x
  2. Step 2: Convert to fraction form
    20,876.16/31,315.72 = 8,396.25/x
  3. Step 3: Cross multiply
    20,876.16x = 31,315.72 × 8,396.25
  4. Step 4: Simplify right side
    20,876.16x = 262,934,614.05
  5. Step 5: Solve for x
    x = 262,934,614.05/20,876.16
  6. Step 6: Final answer
    x = 12,594.97

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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.