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Finding the Fourth Proportional to 15,093.40, 20,827.89 and 8,378.70

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Solution

The fourth proportional to 15,093.40, 20,827.89 and 8,378.70 is: 11,562.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,093.40 : 20,827.89 = 8,378.70 : x
  2. Step 2: Convert to fraction form
    15,093.40/20,827.89 = 8,378.70/x
  3. Step 3: Cross multiply
    15,093.40x = 20,827.89 × 8,378.70
  4. Step 4: Simplify right side
    15,093.40x = 174,510,558.75
  5. Step 5: Solve for x
    x = 174,510,558.75/15,093.40
  6. Step 6: Final answer
    x = 11,562.05

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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.