Home / 20,753.44-31,130-5,170.96

Finding the Fourth Proportional to 20,753.44, 31,130 and 5,170.96

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Solution

The fourth proportional to 20,753.44, 31,130 and 5,170.96 is: 7,756.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,753.44 : 31,130 = 5,170.96 : x
  2. Step 2: Convert to fraction form
    20,753.44/31,130 = 5,170.96/x
  3. Step 3: Cross multiply
    20,753.44x = 31,130 × 5,170.96
  4. Step 4: Simplify right side
    20,753.44x = 160,971,984.80
  5. Step 5: Solve for x
    x = 160,971,984.80/20,753.44
  6. Step 6: Final answer
    x = 7,756.40

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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.