Home / 20,102.48-30,154.80-5,311.88

Finding the Fourth Proportional to 20,102.48, 30,154.80 and 5,311.88

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Solution

The fourth proportional to 20,102.48, 30,154.80 and 5,311.88 is: 7,968.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.48 : 30,154.80 = 5,311.88 : x
  2. Step 2: Convert to fraction form
    20,102.48/30,154.80 = 5,311.88/x
  3. Step 3: Cross multiply
    20,102.48x = 30,154.80 × 5,311.88
  4. Step 4: Simplify right side
    20,102.48x = 160,178,679.02
  5. Step 5: Solve for x
    x = 160,178,679.02/20,102.48
  6. Step 6: Final answer
    x = 7,968.11

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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.