Home / 20,039.28-30,077.16-10,687.20

Finding the Fourth Proportional to 20,039.28, 30,077.16 and 10,687.20

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Solution

The fourth proportional to 20,039.28, 30,077.16 and 10,687.20 is: 16,040.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,039.28 : 30,077.16 = 10,687.20 : x
  2. Step 2: Convert to fraction form
    20,039.28/30,077.16 = 10,687.20/x
  3. Step 3: Cross multiply
    20,039.28x = 30,077.16 × 10,687.20
  4. Step 4: Simplify right side
    20,039.28x = 321,440,624.35
  5. Step 5: Solve for x
    x = 321,440,624.35/20,039.28
  6. Step 6: Final answer
    x = 16,040.53

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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.