Home / 15,106.20-20,844.24-8,391.72

Finding the Fourth Proportional to 15,106.20, 20,844.24 and 8,391.72

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Solution

The fourth proportional to 15,106.20, 20,844.24 and 8,391.72 is: 11,579.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,106.20 : 20,844.24 = 8,391.72 : x
  2. Step 2: Convert to fraction form
    15,106.20/20,844.24 = 8,391.72/x
  3. Step 3: Cross multiply
    15,106.20x = 20,844.24 × 8,391.72
  4. Step 4: Simplify right side
    15,106.20x = 174,919,025.69
  5. Step 5: Solve for x
    x = 174,919,025.69/15,106.20
  6. Step 6: Final answer
    x = 11,579.29

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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.