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Finding the Fourth Proportional to 8,511.48, 11,718.61 and 7,391.99

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Solution

The fourth proportional to 8,511.48, 11,718.61 and 7,391.99 is: 10,177.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.48 : 11,718.61 = 7,391.99 : x
  2. Step 2: Convert to fraction form
    8,511.48/11,718.61 = 7,391.99/x
  3. Step 3: Cross multiply
    8,511.48x = 11,718.61 × 7,391.99
  4. Step 4: Simplify right side
    8,511.48x = 86,623,858.75
  5. Step 5: Solve for x
    x = 86,623,858.75/8,511.48
  6. Step 6: Final answer
    x = 10,177.30

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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.