Home / 12,556.20-17,320.14-8,078.52

Finding the Fourth Proportional to 12,556.20, 17,320.14 and 8,078.52

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Solution

The fourth proportional to 12,556.20, 17,320.14 and 8,078.52 is: 11,143.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,556.20 : 17,320.14 = 8,078.52 : x
  2. Step 2: Convert to fraction form
    12,556.20/17,320.14 = 8,078.52/x
  3. Step 3: Cross multiply
    12,556.20x = 17,320.14 × 8,078.52
  4. Step 4: Simplify right side
    12,556.20x = 139,921,097.39
  5. Step 5: Solve for x
    x = 139,921,097.39/12,556.20
  6. Step 6: Final answer
    x = 11,143.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.