Home / 7,129.37-10,688.28-2,972.49

Finding the Fourth Proportional to 7,129.37, 10,688.28 and 2,972.49

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Solution

The fourth proportional to 7,129.37, 10,688.28 and 2,972.49 is: 4,456.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.37 : 10,688.28 = 2,972.49 : x
  2. Step 2: Convert to fraction form
    7,129.37/10,688.28 = 2,972.49/x
  3. Step 3: Cross multiply
    7,129.37x = 10,688.28 × 2,972.49
  4. Step 4: Simplify right side
    7,129.37x = 31,770,805.42
  5. Step 5: Solve for x
    x = 31,770,805.42/7,129.37
  6. Step 6: Final answer
    x = 4,456.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.