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Finding the Fourth Proportional to 8,639.50, 11,870.84 and 6,868.04

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Solution

The fourth proportional to 8,639.50, 11,870.84 and 6,868.04 is: 9,436.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.50 : 11,870.84 = 6,868.04 : x
  2. Step 2: Convert to fraction form
    8,639.50/11,870.84 = 6,868.04/x
  3. Step 3: Cross multiply
    8,639.50x = 11,870.84 × 6,868.04
  4. Step 4: Simplify right side
    8,639.50x = 81,529,403.95
  5. Step 5: Solve for x
    x = 81,529,403.95/8,639.50
  6. Step 6: Final answer
    x = 9,436.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.