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Finding the Fourth Proportional to 8,561.70, 12,842.55 and 3,021.30

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Solution

The fourth proportional to 8,561.70, 12,842.55 and 3,021.30 is: 4,531.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,561.70 : 12,842.55 = 3,021.30 : x
  2. Step 2: Convert to fraction form
    8,561.70/12,842.55 = 3,021.30/x
  3. Step 3: Cross multiply
    8,561.70x = 12,842.55 × 3,021.30
  4. Step 4: Simplify right side
    8,561.70x = 38,801,196.32
  5. Step 5: Solve for x
    x = 38,801,196.32/8,561.70
  6. Step 6: Final answer
    x = 4,531.95

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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.