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Finding the Fourth Proportional to 8,640.63, 11,916.72 and 6,961.50

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Solution

The fourth proportional to 8,640.63, 11,916.72 and 6,961.50 is: 9,600.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.63 : 11,916.72 = 6,961.50 : x
  2. Step 2: Convert to fraction form
    8,640.63/11,916.72 = 6,961.50/x
  3. Step 3: Cross multiply
    8,640.63x = 11,916.72 × 6,961.50
  4. Step 4: Simplify right side
    8,640.63x = 82,958,246.28
  5. Step 5: Solve for x
    x = 82,958,246.28/8,640.63
  6. Step 6: Final answer
    x = 9,600.95

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1.5x scale

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.