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Finding the Fourth Proportional to 28,861.80, 43,291.08 and 7,801.53

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Solution

The fourth proportional to 28,861.80, 43,291.08 and 7,801.53 is: 11,701.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,861.80 : 43,291.08 = 7,801.53 : x
  2. Step 2: Convert to fraction form
    28,861.80/43,291.08 = 7,801.53/x
  3. Step 3: Cross multiply
    28,861.80x = 43,291.08 × 7,801.53
  4. Step 4: Simplify right side
    28,861.80x = 337,736,659.35
  5. Step 5: Solve for x
    x = 337,736,659.35/28,861.80
  6. Step 6: Final answer
    x = 11,701.86

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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.