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Finding the Fourth Proportional to 28,615.11, 42,914.44 and 9,894.39

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Solution

The fourth proportional to 28,615.11, 42,914.44 and 9,894.39 is: 14,838.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,615.11 : 42,914.44 = 9,894.39 : x
  2. Step 2: Convert to fraction form
    28,615.11/42,914.44 = 9,894.39/x
  3. Step 3: Cross multiply
    28,615.11x = 42,914.44 × 9,894.39
  4. Step 4: Simplify right side
    28,615.11x = 424,612,057.43
  5. Step 5: Solve for x
    x = 424,612,057.43/28,615.11
  6. Step 6: Final answer
    x = 14,838.74

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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.