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Finding the Fourth Proportional to 16,438.80, 22,680.36 and 9,364.80

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Solution

The fourth proportional to 16,438.80, 22,680.36 and 9,364.80 is: 12,920.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,438.80 : 22,680.36 = 9,364.80 : x
  2. Step 2: Convert to fraction form
    16,438.80/22,680.36 = 9,364.80/x
  3. Step 3: Cross multiply
    16,438.80x = 22,680.36 × 9,364.80
  4. Step 4: Simplify right side
    16,438.80x = 212,397,035.33
  5. Step 5: Solve for x
    x = 212,397,035.33/16,438.80
  6. Step 6: Final answer
    x = 12,920.47

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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.