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Finding the Fourth Proportional to 8,643.37, 11,927.67 and 5,286.22

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Solution

The fourth proportional to 8,643.37, 11,927.67 and 5,286.22 is: 7,294.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.37 : 11,927.67 = 5,286.22 : x
  2. Step 2: Convert to fraction form
    8,643.37/11,927.67 = 5,286.22/x
  3. Step 3: Cross multiply
    8,643.37x = 11,927.67 × 5,286.22
  4. Step 4: Simplify right side
    8,643.37x = 63,052,287.71
  5. Step 5: Solve for x
    x = 63,052,287.71/8,643.37
  6. Step 6: Final answer
    x = 7,294.87

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Half scale
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Double scale
Find fourth proportional to 8,644.37, 11,929.05 and 5,287.22
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.