Home / 20,721.43-31,056.01-8,861.19

Finding the Fourth Proportional to 20,721.43, 31,056.01 and 8,861.19

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Solution

The fourth proportional to 20,721.43, 31,056.01 and 8,861.19 is: 13,280.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,721.43 : 31,056.01 = 8,861.19 : x
  2. Step 2: Convert to fraction form
    20,721.43/31,056.01 = 8,861.19/x
  3. Step 3: Cross multiply
    20,721.43x = 31,056.01 × 8,861.19
  4. Step 4: Simplify right side
    20,721.43x = 275,193,205.25
  5. Step 5: Solve for x
    x = 275,193,205.25/20,721.43
  6. Step 6: Final answer
    x = 13,280.61

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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.