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Finding the Fourth Proportional to 15,105.95, 20,846.48 and 8,392.19

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Solution

The fourth proportional to 15,105.95, 20,846.48 and 8,392.19 is: 11,581.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,105.95 : 20,846.48 = 8,392.19 : x
  2. Step 2: Convert to fraction form
    15,105.95/20,846.48 = 8,392.19/x
  3. Step 3: Cross multiply
    15,105.95x = 20,846.48 × 8,392.19
  4. Step 4: Simplify right side
    15,105.95x = 174,947,474.80
  5. Step 5: Solve for x
    x = 174,947,474.80/15,105.95
  6. Step 6: Final answer
    x = 11,581.37

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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.