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Finding the Fourth Proportional to 11,393.95, 15,723.11 and 8,408.70

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Solution

The fourth proportional to 11,393.95, 15,723.11 and 8,408.70 is: 11,603.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,393.95 : 15,723.11 = 8,408.70 : x
  2. Step 2: Convert to fraction form
    11,393.95/15,723.11 = 8,408.70/x
  3. Step 3: Cross multiply
    11,393.95x = 15,723.11 × 8,408.70
  4. Step 4: Simplify right side
    11,393.95x = 132,210,836.44
  5. Step 5: Solve for x
    x = 132,210,836.44/11,393.95
  6. Step 6: Final answer
    x = 11,603.60

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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.