Home / 20,079.40-30,120.04-9,699.88

Finding the Fourth Proportional to 20,079.40, 30,120.04 and 9,699.88

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Solution

The fourth proportional to 20,079.40, 30,120.04 and 9,699.88 is: 14,550.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.40 : 30,120.04 = 9,699.88 : x
  2. Step 2: Convert to fraction form
    20,079.40/30,120.04 = 9,699.88/x
  3. Step 3: Cross multiply
    20,079.40x = 30,120.04 × 9,699.88
  4. Step 4: Simplify right side
    20,079.40x = 292,160,773.60
  5. Step 5: Solve for x
    x = 292,160,773.60/20,079.40
  6. Step 6: Final answer
    x = 14,550.27

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1.5x scale

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.