Home / 20,288.88-30,424.68-12,886.56

Finding the Fourth Proportional to 20,288.88, 30,424.68 and 12,886.56

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Solution

The fourth proportional to 20,288.88, 30,424.68 and 12,886.56 is: 19,324.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,288.88 : 30,424.68 = 12,886.56 : x
  2. Step 2: Convert to fraction form
    20,288.88/30,424.68 = 12,886.56/x
  3. Step 3: Cross multiply
    20,288.88x = 30,424.68 × 12,886.56
  4. Step 4: Simplify right side
    20,288.88x = 392,069,464.30
  5. Step 5: Solve for x
    x = 392,069,464.30/20,288.88
  6. Step 6: Final answer
    x = 19,324.35

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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.