Home / 20,079.96-30,120-18,862.08

Finding the Fourth Proportional to 20,079.96, 30,120 and 18,862.08

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Solution

The fourth proportional to 20,079.96, 30,120 and 18,862.08 is: 28,293.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.96 : 30,120 = 18,862.08 : x
  2. Step 2: Convert to fraction form
    20,079.96/30,120 = 18,862.08/x
  3. Step 3: Cross multiply
    20,079.96x = 30,120 × 18,862.08
  4. Step 4: Simplify right side
    20,079.96x = 568,125,849.60
  5. Step 5: Solve for x
    x = 568,125,849.60/20,079.96
  6. Step 6: Final answer
    x = 28,293.18

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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.