Home / 20,900.53-31,355.57-6,861.75

Finding the Fourth Proportional to 20,900.53, 31,355.57 and 6,861.75

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Solution

The fourth proportional to 20,900.53, 31,355.57 and 6,861.75 is: 10,294.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.53 : 31,355.57 = 6,861.75 : x
  2. Step 2: Convert to fraction form
    20,900.53/31,355.57 = 6,861.75/x
  3. Step 3: Cross multiply
    20,900.53x = 31,355.57 × 6,861.75
  4. Step 4: Simplify right side
    20,900.53x = 215,153,982.02
  5. Step 5: Solve for x
    x = 215,153,982.02/20,900.53
  6. Step 6: Final answer
    x = 10,294.19

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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.