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Finding the Fourth Proportional to 8,862, 13,298.76 and 3,390

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Solution

The fourth proportional to 8,862, 13,298.76 and 3,390 is: 5,087.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,862 : 13,298.76 = 3,390 : x
  2. Step 2: Convert to fraction form
    8,862/13,298.76 = 3,390/x
  3. Step 3: Cross multiply
    8,862x = 13,298.76 × 3,390
  4. Step 4: Simplify right side
    8,862x = 45,082,796.40
  5. Step 5: Solve for x
    x = 45,082,796.40/8,862
  6. Step 6: Final answer
    x = 5,087.20

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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.