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Finding the Fourth Proportional to 7,087.70, 9,781.11 and 3,901.37

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Solution

The fourth proportional to 7,087.70, 9,781.11 and 3,901.37 is: 5,383.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,087.70 : 9,781.11 = 3,901.37 : x
  2. Step 2: Convert to fraction form
    7,087.70/9,781.11 = 3,901.37/x
  3. Step 3: Cross multiply
    7,087.70x = 9,781.11 × 3,901.37
  4. Step 4: Simplify right side
    7,087.70x = 38,159,680.22
  5. Step 5: Solve for x
    x = 38,159,680.22/7,087.70
  6. Step 6: Final answer
    x = 5,383.93

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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.