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Finding the Fourth Proportional to 8,020.80, 11,064.96 and 5,921.28

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Solution

The fourth proportional to 8,020.80, 11,064.96 and 5,921.28 is: 8,168.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,020.80 : 11,064.96 = 5,921.28 : x
  2. Step 2: Convert to fraction form
    8,020.80/11,064.96 = 5,921.28/x
  3. Step 3: Cross multiply
    8,020.80x = 11,064.96 × 5,921.28
  4. Step 4: Simplify right side
    8,020.80x = 65,518,726.35
  5. Step 5: Solve for x
    x = 65,518,726.35/8,020.80
  6. Step 6: Final answer
    x = 8,168.60

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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.