Home / 20,079.95-30,120.12-5,290.97

Finding the Fourth Proportional to 20,079.95, 30,120.12 and 5,290.97

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Solution

The fourth proportional to 20,079.95, 30,120.12 and 5,290.97 is: 7,936.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.95 : 30,120.12 = 5,290.97 : x
  2. Step 2: Convert to fraction form
    20,079.95/30,120.12 = 5,290.97/x
  3. Step 3: Cross multiply
    20,079.95x = 30,120.12 × 5,290.97
  4. Step 4: Simplify right side
    20,079.95x = 159,364,500.72
  5. Step 5: Solve for x
    x = 159,364,500.72/20,079.95
  6. Step 6: Final answer
    x = 7,936.50

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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.