Home / 20,258.80-30,388.18-10,392.56

Finding the Fourth Proportional to 20,258.80, 30,388.18 and 10,392.56

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Solution

The fourth proportional to 20,258.80, 30,388.18 and 10,392.56 is: 15,588.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.80 : 30,388.18 = 10,392.56 : x
  2. Step 2: Convert to fraction form
    20,258.80/30,388.18 = 10,392.56/x
  3. Step 3: Cross multiply
    20,258.80x = 30,388.18 × 10,392.56
  4. Step 4: Simplify right side
    20,258.80x = 315,810,983.94
  5. Step 5: Solve for x
    x = 315,810,983.94/20,258.80
  6. Step 6: Final answer
    x = 15,588.83

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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.