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Finding the Fourth Proportional to 8,208.60, 12,315.80 and 4,051.52

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Solution

The fourth proportional to 8,208.60, 12,315.80 and 4,051.52 is: 6,078.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,208.60 : 12,315.80 = 4,051.52 : x
  2. Step 2: Convert to fraction form
    8,208.60/12,315.80 = 4,051.52/x
  3. Step 3: Cross multiply
    8,208.60x = 12,315.80 × 4,051.52
  4. Step 4: Simplify right side
    8,208.60x = 49,897,704.75
  5. Step 5: Solve for x
    x = 49,897,704.75/8,208.60
  6. Step 6: Final answer
    x = 6,078.71

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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.