Home / 20,142.30-30,216.53-10,276.20

Finding the Fourth Proportional to 20,142.30, 30,216.53 and 10,276.20

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Solution

The fourth proportional to 20,142.30, 30,216.53 and 10,276.20 is: 15,415.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.30 : 30,216.53 = 10,276.20 : x
  2. Step 2: Convert to fraction form
    20,142.30/30,216.53 = 10,276.20/x
  3. Step 3: Cross multiply
    20,142.30x = 30,216.53 × 10,276.20
  4. Step 4: Simplify right side
    20,142.30x = 310,511,105.59
  5. Step 5: Solve for x
    x = 310,511,105.59/20,142.30
  6. Step 6: Final answer
    x = 15,415.87

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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.