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Finding the Fourth Proportional to 8,558.10, 11,815.74 and 7,660.28

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Solution

The fourth proportional to 8,558.10, 11,815.74 and 7,660.28 is: 10,576.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,558.10 : 11,815.74 = 7,660.28 : x
  2. Step 2: Convert to fraction form
    8,558.10/11,815.74 = 7,660.28/x
  3. Step 3: Cross multiply
    8,558.10x = 11,815.74 × 7,660.28
  4. Step 4: Simplify right side
    8,558.10x = 90,511,876.81
  5. Step 5: Solve for x
    x = 90,511,876.81/8,558.10
  6. Step 6: Final answer
    x = 10,576.16

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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.