Home / 11,148.79-15,395.71-7,176.78

Finding the Fourth Proportional to 11,148.79, 15,395.71 and 7,176.78

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Solution

The fourth proportional to 11,148.79, 15,395.71 and 7,176.78 is: 9,910.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,148.79 : 15,395.71 = 7,176.78 : x
  2. Step 2: Convert to fraction form
    11,148.79/15,395.71 = 7,176.78/x
  3. Step 3: Cross multiply
    11,148.79x = 15,395.71 × 7,176.78
  4. Step 4: Simplify right side
    11,148.79x = 110,491,680.05
  5. Step 5: Solve for x
    x = 110,491,680.05/11,148.79
  6. Step 6: Final answer
    x = 9,910.65

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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.