Home / 20,278.20-30,417.30-11,530.20

Finding the Fourth Proportional to 20,278.20, 30,417.30 and 11,530.20

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Solution

The fourth proportional to 20,278.20, 30,417.30 and 11,530.20 is: 17,295.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.20 : 30,417.30 = 11,530.20 : x
  2. Step 2: Convert to fraction form
    20,278.20/30,417.30 = 11,530.20/x
  3. Step 3: Cross multiply
    20,278.20x = 30,417.30 × 11,530.20
  4. Step 4: Simplify right side
    20,278.20x = 350,717,552.46
  5. Step 5: Solve for x
    x = 350,717,552.46/20,278.20
  6. Step 6: Final answer
    x = 17,295.30

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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.