Home / 8,431.20-12,647.10-2,587.80

Finding the Fourth Proportional to 8,431.20, 12,647.10 and 2,587.80

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Solution

The fourth proportional to 8,431.20, 12,647.10 and 2,587.80 is: 3,881.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,431.20 : 12,647.10 = 2,587.80 : x
  2. Step 2: Convert to fraction form
    8,431.20/12,647.10 = 2,587.80/x
  3. Step 3: Cross multiply
    8,431.20x = 12,647.10 × 2,587.80
  4. Step 4: Simplify right side
    8,431.20x = 32,728,165.38
  5. Step 5: Solve for x
    x = 32,728,165.38/8,431.20
  6. Step 6: Final answer
    x = 3,881.79

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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.