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Finding the Fourth Proportional to 12,405.91, 18,589.41 and 10,549.39

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Solution

The fourth proportional to 12,405.91, 18,589.41 and 10,549.39 is: 15,807.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.91 : 18,589.41 = 10,549.39 : x
  2. Step 2: Convert to fraction form
    12,405.91/18,589.41 = 10,549.39/x
  3. Step 3: Cross multiply
    12,405.91x = 18,589.41 × 10,549.39
  4. Step 4: Simplify right side
    12,405.91x = 196,106,935.96
  5. Step 5: Solve for x
    x = 196,106,935.96/12,405.91
  6. Step 6: Final answer
    x = 15,807.54

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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.