Home / 20,120.40-30,156.30-10,254.60

Finding the Fourth Proportional to 20,120.40, 30,156.30 and 10,254.60

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Solution

The fourth proportional to 20,120.40, 30,156.30 and 10,254.60 is: 15,369.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.40 : 30,156.30 = 10,254.60 : x
  2. Step 2: Convert to fraction form
    20,120.40/30,156.30 = 10,254.60/x
  3. Step 3: Cross multiply
    20,120.40x = 30,156.30 × 10,254.60
  4. Step 4: Simplify right side
    20,120.40x = 309,240,793.98
  5. Step 5: Solve for x
    x = 309,240,793.98/20,120.40
  6. Step 6: Final answer
    x = 15,369.52

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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.