Home / 20,140.60-30,207.30-12,731.80

Finding the Fourth Proportional to 20,140.60, 30,207.30 and 12,731.80

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Solution

The fourth proportional to 20,140.60, 30,207.30 and 12,731.80 is: 19,095.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.60 : 30,207.30 = 12,731.80 : x
  2. Step 2: Convert to fraction form
    20,140.60/30,207.30 = 12,731.80/x
  3. Step 3: Cross multiply
    20,140.60x = 30,207.30 × 12,731.80
  4. Step 4: Simplify right side
    20,140.60x = 384,593,302.14
  5. Step 5: Solve for x
    x = 384,593,302.14/20,140.60
  6. Step 6: Final answer
    x = 19,095.42

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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.