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Finding the Fourth Proportional to 12,288.37, 18,422.11 and 5,718.37

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Solution

The fourth proportional to 12,288.37, 18,422.11 and 5,718.37 is: 8,572.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,288.37 : 18,422.11 = 5,718.37 : x
  2. Step 2: Convert to fraction form
    12,288.37/18,422.11 = 5,718.37/x
  3. Step 3: Cross multiply
    12,288.37x = 18,422.11 × 5,718.37
  4. Step 4: Simplify right side
    12,288.37x = 105,344,334.75
  5. Step 5: Solve for x
    x = 105,344,334.75/12,288.37
  6. Step 6: Final answer
    x = 8,572.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.