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Finding the Fourth Proportional to 16,390.84, 22,619.50 and 8,939.32

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Solution

The fourth proportional to 16,390.84, 22,619.50 and 8,939.32 is: 12,336.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,390.84 : 22,619.50 = 8,939.32 : x
  2. Step 2: Convert to fraction form
    16,390.84/22,619.50 = 8,939.32/x
  3. Step 3: Cross multiply
    16,390.84x = 22,619.50 × 8,939.32
  4. Step 4: Simplify right side
    16,390.84x = 202,202,948.74
  5. Step 5: Solve for x
    x = 202,202,948.74/16,390.84
  6. Step 6: Final answer
    x = 12,336.34

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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.