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Finding the Fourth Proportional to 16,439.09, 22,685.94 and 8,987.09

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Solution

The fourth proportional to 16,439.09, 22,685.94 and 8,987.09 is: 12,402.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,439.09 : 22,685.94 = 8,987.09 : x
  2. Step 2: Convert to fraction form
    16,439.09/22,685.94 = 8,987.09/x
  3. Step 3: Cross multiply
    16,439.09x = 22,685.94 × 8,987.09
  4. Step 4: Simplify right side
    16,439.09x = 203,880,471.08
  5. Step 5: Solve for x
    x = 203,880,471.08/16,439.09
  6. Step 6: Final answer
    x = 12,402.18

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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.