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Finding the Fourth Proportional to 18,406.89, 27,589.32 and 8,389.35

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Solution

The fourth proportional to 18,406.89, 27,589.32 and 8,389.35 is: 12,574.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,406.89 : 27,589.32 = 8,389.35 : x
  2. Step 2: Convert to fraction form
    18,406.89/27,589.32 = 8,389.35/x
  3. Step 3: Cross multiply
    18,406.89x = 27,589.32 × 8,389.35
  4. Step 4: Simplify right side
    18,406.89x = 231,456,461.74
  5. Step 5: Solve for x
    x = 231,456,461.74/18,406.89
  6. Step 6: Final answer
    x = 12,574.45

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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.