Home / 15,106.05-20,846.46-8,391.78

Finding the Fourth Proportional to 15,106.05, 20,846.46 and 8,391.78

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Solution

The fourth proportional to 15,106.05, 20,846.46 and 8,391.78 is: 11,580.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,106.05 : 20,846.46 = 8,391.78 : x
  2. Step 2: Convert to fraction form
    15,106.05/20,846.46 = 8,391.78/x
  3. Step 3: Cross multiply
    15,106.05x = 20,846.46 × 8,391.78
  4. Step 4: Simplify right side
    15,106.05x = 174,938,906.10
  5. Step 5: Solve for x
    x = 174,938,906.10/15,106.05
  6. Step 6: Final answer
    x = 11,580.72

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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.