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Finding the Fourth Proportional to 8,390.96, 12,588.30 and 2,843.84

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Solution

The fourth proportional to 8,390.96, 12,588.30 and 2,843.84 is: 4,266.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.96 : 12,588.30 = 2,843.84 : x
  2. Step 2: Convert to fraction form
    8,390.96/12,588.30 = 2,843.84/x
  3. Step 3: Cross multiply
    8,390.96x = 12,588.30 × 2,843.84
  4. Step 4: Simplify right side
    8,390.96x = 35,799,111.07
  5. Step 5: Solve for x
    x = 35,799,111.07/8,390.96
  6. Step 6: Final answer
    x = 4,266.39

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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.