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Finding the Fourth Proportional to 8,859.69, 13,289.90 and 3,312.47

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Solution

The fourth proportional to 8,859.69, 13,289.90 and 3,312.47 is: 4,968.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,859.69 : 13,289.90 = 3,312.47 : x
  2. Step 2: Convert to fraction form
    8,859.69/13,289.90 = 3,312.47/x
  3. Step 3: Cross multiply
    8,859.69x = 13,289.90 × 3,312.47
  4. Step 4: Simplify right side
    8,859.69x = 44,022,312.04
  5. Step 5: Solve for x
    x = 44,022,312.04/8,859.69
  6. Step 6: Final answer
    x = 4,968.83

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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.