Home / 20,135.72-30,203.52-6,988.04

Finding the Fourth Proportional to 20,135.72, 30,203.52 and 6,988.04

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Solution

The fourth proportional to 20,135.72, 30,203.52 and 6,988.04 is: 10,482.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.72 : 30,203.52 = 6,988.04 : x
  2. Step 2: Convert to fraction form
    20,135.72/30,203.52 = 6,988.04/x
  3. Step 3: Cross multiply
    20,135.72x = 30,203.52 × 6,988.04
  4. Step 4: Simplify right side
    20,135.72x = 211,063,405.90
  5. Step 5: Solve for x
    x = 211,063,405.90/20,135.72
  6. Step 6: Final answer
    x = 10,482.04

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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.