Home / 7,389.28-11,078.07-3,689.47

Finding the Fourth Proportional to 7,389.28, 11,078.07 and 3,689.47

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Solution

The fourth proportional to 7,389.28, 11,078.07 and 3,689.47 is: 5,531.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,389.28 : 11,078.07 = 3,689.47 : x
  2. Step 2: Convert to fraction form
    7,389.28/11,078.07 = 3,689.47/x
  3. Step 3: Cross multiply
    7,389.28x = 11,078.07 × 3,689.47
  4. Step 4: Simplify right side
    7,389.28x = 40,872,206.92
  5. Step 5: Solve for x
    x = 40,872,206.92/7,389.28
  6. Step 6: Final answer
    x = 5,531.28

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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.