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Finding the Fourth Proportional to 8,656.59, 12,987.97 and 2,813.22

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Solution

The fourth proportional to 8,656.59, 12,987.97 and 2,813.22 is: 4,220.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.59 : 12,987.97 = 2,813.22 : x
  2. Step 2: Convert to fraction form
    8,656.59/12,987.97 = 2,813.22/x
  3. Step 3: Cross multiply
    8,656.59x = 12,987.97 × 2,813.22
  4. Step 4: Simplify right side
    8,656.59x = 36,537,944.99
  5. Step 5: Solve for x
    x = 36,537,944.99/8,656.59
  6. Step 6: Final answer
    x = 4,220.83

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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.