Home / 20,258.20-30,387.30-19,286.20

Finding the Fourth Proportional to 20,258.20, 30,387.30 and 19,286.20

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Solution

The fourth proportional to 20,258.20, 30,387.30 and 19,286.20 is: 28,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.20 : 30,387.30 = 19,286.20 : x
  2. Step 2: Convert to fraction form
    20,258.20/30,387.30 = 19,286.20/x
  3. Step 3: Cross multiply
    20,258.20x = 30,387.30 × 19,286.20
  4. Step 4: Simplify right side
    20,258.20x = 586,055,545.26
  5. Step 5: Solve for x
    x = 586,055,545.26/20,258.20
  6. Step 6: Final answer
    x = 28,929.30

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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.