Home / 8,658.37-12,988.17-3,111.76

Finding the Fourth Proportional to 8,658.37, 12,988.17 and 3,111.76

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Solution

The fourth proportional to 8,658.37, 12,988.17 and 3,111.76 is: 4,667.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.37 : 12,988.17 = 3,111.76 : x
  2. Step 2: Convert to fraction form
    8,658.37/12,988.17 = 3,111.76/x
  3. Step 3: Cross multiply
    8,658.37x = 12,988.17 × 3,111.76
  4. Step 4: Simplify right side
    8,658.37x = 40,416,067.88
  5. Step 5: Solve for x
    x = 40,416,067.88/8,658.37
  6. Step 6: Final answer
    x = 4,667.86

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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.