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Finding the Fourth Proportional to 8,610.79, 11,886.83 and 6,620.65

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Solution

The fourth proportional to 8,610.79, 11,886.83 and 6,620.65 is: 9,139.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,610.79 : 11,886.83 = 6,620.65 : x
  2. Step 2: Convert to fraction form
    8,610.79/11,886.83 = 6,620.65/x
  3. Step 3: Cross multiply
    8,610.79x = 11,886.83 × 6,620.65
  4. Step 4: Simplify right side
    8,610.79x = 78,698,541.04
  5. Step 5: Solve for x
    x = 78,698,541.04/8,610.79
  6. Step 6: Final answer
    x = 9,139.53

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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.