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Finding the Fourth Proportional to 8,239.33, 11,366.32 and 7,921.06

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Solution

The fourth proportional to 8,239.33, 11,366.32 and 7,921.06 is: 10,927.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,239.33 : 11,366.32 = 7,921.06 : x
  2. Step 2: Convert to fraction form
    8,239.33/11,366.32 = 7,921.06/x
  3. Step 3: Cross multiply
    8,239.33x = 11,366.32 × 7,921.06
  4. Step 4: Simplify right side
    8,239.33x = 90,033,302.70
  5. Step 5: Solve for x
    x = 90,033,302.70/8,239.33
  6. Step 6: Final answer
    x = 10,927.26

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Double scale
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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.