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Finding the Fourth Proportional to 15,093.11, 20,826.28 and 8,378.79

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Solution

The fourth proportional to 15,093.11, 20,826.28 and 8,378.79 is: 11,561.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,093.11 : 20,826.28 = 8,378.79 : x
  2. Step 2: Convert to fraction form
    15,093.11/20,826.28 = 8,378.79/x
  3. Step 3: Cross multiply
    15,093.11x = 20,826.28 × 8,378.79
  4. Step 4: Simplify right side
    15,093.11x = 174,499,040.78
  5. Step 5: Solve for x
    x = 174,499,040.78/15,093.11
  6. Step 6: Final answer
    x = 11,561.50

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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.