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Finding the Fourth Proportional to 28,508.76, 42,759.09 and 9,788.49

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Solution

The fourth proportional to 28,508.76, 42,759.09 and 9,788.49 is: 14,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,508.76 : 42,759.09 = 9,788.49 : x
  2. Step 2: Convert to fraction form
    28,508.76/42,759.09 = 9,788.49/x
  3. Step 3: Cross multiply
    28,508.76x = 42,759.09 × 9,788.49
  4. Step 4: Simplify right side
    28,508.76x = 418,546,924.87
  5. Step 5: Solve for x
    x = 418,546,924.87/28,508.76
  6. Step 6: Final answer
    x = 14,681.34

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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.