Home / 7,312.68-10,969.12-2,118.56

Finding the Fourth Proportional to 7,312.68, 10,969.12 and 2,118.56

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Solution

The fourth proportional to 7,312.68, 10,969.12 and 2,118.56 is: 3,177.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.68 : 10,969.12 = 2,118.56 : x
  2. Step 2: Convert to fraction form
    7,312.68/10,969.12 = 2,118.56/x
  3. Step 3: Cross multiply
    7,312.68x = 10,969.12 × 2,118.56
  4. Step 4: Simplify right side
    7,312.68x = 23,238,738.87
  5. Step 5: Solve for x
    x = 23,238,738.87/7,312.68
  6. Step 6: Final answer
    x = 3,177.87

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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.