Home / 20,079.40-30,119.45-5,287.76

Finding the Fourth Proportional to 20,079.40, 30,119.45 and 5,287.76

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Solution

The fourth proportional to 20,079.40, 30,119.45 and 5,287.76 is: 7,931.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.40 : 30,119.45 = 5,287.76 : x
  2. Step 2: Convert to fraction form
    20,079.40/30,119.45 = 5,287.76/x
  3. Step 3: Cross multiply
    20,079.40x = 30,119.45 × 5,287.76
  4. Step 4: Simplify right side
    20,079.40x = 159,264,422.93
  5. Step 5: Solve for x
    x = 159,264,422.93/20,079.40
  6. Step 6: Final answer
    x = 7,931.73

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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.