Home / 13,931.57-20,902.69-8,388.88

Finding the Fourth Proportional to 13,931.57, 20,902.69 and 8,388.88

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Solution

The fourth proportional to 13,931.57, 20,902.69 and 8,388.88 is: 12,586.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,931.57 : 20,902.69 = 8,388.88 : x
  2. Step 2: Convert to fraction form
    13,931.57/20,902.69 = 8,388.88/x
  3. Step 3: Cross multiply
    13,931.57x = 20,902.69 × 8,388.88
  4. Step 4: Simplify right side
    13,931.57x = 175,350,053.57
  5. Step 5: Solve for x
    x = 175,350,053.57/13,931.57
  6. Step 6: Final answer
    x = 12,586.52

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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.