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Finding the Fourth Proportional to 8,639.50, 11,923.95 and 6,539.98

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Solution

The fourth proportional to 8,639.50, 11,923.95 and 6,539.98 is: 9,026.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.50 : 11,923.95 = 6,539.98 : x
  2. Step 2: Convert to fraction form
    8,639.50/11,923.95 = 6,539.98/x
  3. Step 3: Cross multiply
    8,639.50x = 11,923.95 × 6,539.98
  4. Step 4: Simplify right side
    8,639.50x = 77,982,394.52
  5. Step 5: Solve for x
    x = 77,982,394.52/8,639.50
  6. Step 6: Final answer
    x = 9,026.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.