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Finding the Fourth Proportional to 15,106.06, 20,844.12 and 8,391.79

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Solution

The fourth proportional to 15,106.06, 20,844.12 and 8,391.79 is: 11,579.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,106.06 : 20,844.12 = 8,391.79 : x
  2. Step 2: Convert to fraction form
    15,106.06/20,844.12 = 8,391.79/x
  3. Step 3: Cross multiply
    15,106.06x = 20,844.12 × 8,391.79
  4. Step 4: Simplify right side
    15,106.06x = 174,919,477.77
  5. Step 5: Solve for x
    x = 174,919,477.77/15,106.06
  6. Step 6: Final answer
    x = 11,579.42

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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.