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Finding the Fourth Proportional to 8,620.52, 11,886.90 and 5,821.16

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Solution

The fourth proportional to 8,620.52, 11,886.90 and 5,821.16 is: 8,026.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,620.52 : 11,886.90 = 5,821.16 : x
  2. Step 2: Convert to fraction form
    8,620.52/11,886.90 = 5,821.16/x
  3. Step 3: Cross multiply
    8,620.52x = 11,886.90 × 5,821.16
  4. Step 4: Simplify right side
    8,620.52x = 69,195,546.80
  5. Step 5: Solve for x
    x = 69,195,546.80/8,620.52
  6. Step 6: Final answer
    x = 8,026.84

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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.