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Finding the Fourth Proportional to 28,988.99, 43,404.43 and 21,947.70

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Solution

The fourth proportional to 28,988.99, 43,404.43 and 21,947.70 is: 32,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,988.99 : 43,404.43 = 21,947.70 : x
  2. Step 2: Convert to fraction form
    28,988.99/43,404.43 = 21,947.70/x
  3. Step 3: Cross multiply
    28,988.99x = 43,404.43 × 21,947.70
  4. Step 4: Simplify right side
    28,988.99x = 952,627,408.31
  5. Step 5: Solve for x
    x = 952,627,408.31/28,988.99
  6. Step 6: Final answer
    x = 32,861.70

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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.