Home / 20,125.40-30,200.38-12,719.66

Finding the Fourth Proportional to 20,125.40, 30,200.38 and 12,719.66

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Solution

The fourth proportional to 20,125.40, 30,200.38 and 12,719.66 is: 19,087.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.40 : 30,200.38 = 12,719.66 : x
  2. Step 2: Convert to fraction form
    20,125.40/30,200.38 = 12,719.66/x
  3. Step 3: Cross multiply
    20,125.40x = 30,200.38 × 12,719.66
  4. Step 4: Simplify right side
    20,125.40x = 384,138,382.67
  5. Step 5: Solve for x
    x = 384,138,382.67/20,125.40
  6. Step 6: Final answer
    x = 19,087.25

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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.