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Finding the Fourth Proportional to 8,860.40, 13,285.80 and 3,660.40

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Solution

The fourth proportional to 8,860.40, 13,285.80 and 3,660.40 is: 5,488.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,860.40 : 13,285.80 = 3,660.40 : x
  2. Step 2: Convert to fraction form
    8,860.40/13,285.80 = 3,660.40/x
  3. Step 3: Cross multiply
    8,860.40x = 13,285.80 × 3,660.40
  4. Step 4: Simplify right side
    8,860.40x = 48,631,342.32
  5. Step 5: Solve for x
    x = 48,631,342.32/8,860.40
  6. Step 6: Final answer
    x = 5,488.62

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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.