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Finding the Fourth Proportional to 28,495.62, 42,747.60 and 8,775.90

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Solution

The fourth proportional to 28,495.62, 42,747.60 and 8,775.90 is: 13,165.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,495.62 : 42,747.60 = 8,775.90 : x
  2. Step 2: Convert to fraction form
    28,495.62/42,747.60 = 8,775.90/x
  3. Step 3: Cross multiply
    28,495.62x = 42,747.60 × 8,775.90
  4. Step 4: Simplify right side
    28,495.62x = 375,148,662.84
  5. Step 5: Solve for x
    x = 375,148,662.84/28,495.62
  6. Step 6: Final answer
    x = 13,165.13

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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.