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Finding the Fourth Proportional to 7,133.94, 9,844.85 and 3,990.13

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Solution

The fourth proportional to 7,133.94, 9,844.85 and 3,990.13 is: 5,506.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,133.94 : 9,844.85 = 3,990.13 : x
  2. Step 2: Convert to fraction form
    7,133.94/9,844.85 = 3,990.13/x
  3. Step 3: Cross multiply
    7,133.94x = 9,844.85 × 3,990.13
  4. Step 4: Simplify right side
    7,133.94x = 39,282,231.33
  5. Step 5: Solve for x
    x = 39,282,231.33/7,133.94
  6. Step 6: Final answer
    x = 5,506.39

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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.