Home / 7,911-11,868.16-2,717.28

Finding the Fourth Proportional to 7,911, 11,868.16 and 2,717.28

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Solution

The fourth proportional to 7,911, 11,868.16 and 2,717.28 is: 4,076.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911 : 11,868.16 = 2,717.28 : x
  2. Step 2: Convert to fraction form
    7,911/11,868.16 = 2,717.28/x
  3. Step 3: Cross multiply
    7,911x = 11,868.16 × 2,717.28
  4. Step 4: Simplify right side
    7,911x = 32,249,113.80
  5. Step 5: Solve for x
    x = 32,249,113.80/7,911
  6. Step 6: Final answer
    x = 4,076.49

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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.