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Finding the Fourth Proportional to 11,287.78, 15,579.73 and 7,511.10

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Solution

The fourth proportional to 11,287.78, 15,579.73 and 7,511.10 is: 10,367.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287.78 : 15,579.73 = 7,511.10 : x
  2. Step 2: Convert to fraction form
    11,287.78/15,579.73 = 7,511.10/x
  3. Step 3: Cross multiply
    11,287.78x = 15,579.73 × 7,511.10
  4. Step 4: Simplify right side
    11,287.78x = 117,020,910.00
  5. Step 5: Solve for x
    x = 117,020,910.00/11,287.78
  6. Step 6: Final answer
    x = 10,367.04

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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.