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Finding the Fourth Proportional to 8,885.40, 13,325.28 and 3,690

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Solution

The fourth proportional to 8,885.40, 13,325.28 and 3,690 is: 5,533.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,885.40 : 13,325.28 = 3,690 : x
  2. Step 2: Convert to fraction form
    8,885.40/13,325.28 = 3,690/x
  3. Step 3: Cross multiply
    8,885.40x = 13,325.28 × 3,690
  4. Step 4: Simplify right side
    8,885.40x = 49,170,283.20
  5. Step 5: Solve for x
    x = 49,170,283.20/8,885.40
  6. Step 6: Final answer
    x = 5,533.83

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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.