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Finding the Fourth Proportional to 28,748.81, 43,123.11 and 9,028.95

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Solution

The fourth proportional to 28,748.81, 43,123.11 and 9,028.95 is: 13,543.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,748.81 : 43,123.11 = 9,028.95 : x
  2. Step 2: Convert to fraction form
    28,748.81/43,123.11 = 9,028.95/x
  3. Step 3: Cross multiply
    28,748.81x = 43,123.11 × 9,028.95
  4. Step 4: Simplify right side
    28,748.81x = 389,356,404.03
  5. Step 5: Solve for x
    x = 389,356,404.03/28,748.81
  6. Step 6: Final answer
    x = 13,543.39

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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.