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Finding the Fourth Proportional to 8,889.39, 12,268.40 and 5,305.23

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Solution

The fourth proportional to 8,889.39, 12,268.40 and 5,305.23 is: 7,321.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.39 : 12,268.40 = 5,305.23 : x
  2. Step 2: Convert to fraction form
    8,889.39/12,268.40 = 5,305.23/x
  3. Step 3: Cross multiply
    8,889.39x = 12,268.40 × 5,305.23
  4. Step 4: Simplify right side
    8,889.39x = 65,086,657.21
  5. Step 5: Solve for x
    x = 65,086,657.21/8,889.39
  6. Step 6: Final answer
    x = 7,321.84

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Half scale
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Double scale
Find fourth proportional to 8,890.39, 12,269.78 and 5,306.23
Similar ratio
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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.