Home / 20,139.80-30,212.78-10,273.70

Finding the Fourth Proportional to 20,139.80, 30,212.78 and 10,273.70

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Solution

The fourth proportional to 20,139.80, 30,212.78 and 10,273.70 is: 15,412.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.80 : 30,212.78 = 10,273.70 : x
  2. Step 2: Convert to fraction form
    20,139.80/30,212.78 = 10,273.70/x
  3. Step 3: Cross multiply
    20,139.80x = 30,212.78 × 10,273.70
  4. Step 4: Simplify right side
    20,139.80x = 310,396,892.10
  5. Step 5: Solve for x
    x = 310,396,892.10/20,139.80
  6. Step 6: Final answer
    x = 15,412.11

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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.