Home / 12,789.15-19,158.18-10,161.11

Finding the Fourth Proportional to 12,789.15, 19,158.18 and 10,161.11

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Solution

The fourth proportional to 12,789.15, 19,158.18 and 10,161.11 is: 15,221.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.15 : 19,158.18 = 10,161.11 : x
  2. Step 2: Convert to fraction form
    12,789.15/19,158.18 = 10,161.11/x
  3. Step 3: Cross multiply
    12,789.15x = 19,158.18 × 10,161.11
  4. Step 4: Simplify right side
    12,789.15x = 194,668,278.59
  5. Step 5: Solve for x
    x = 194,668,278.59/12,789.15
  6. Step 6: Final answer
    x = 15,221.36

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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.