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Finding the Fourth Proportional to 16,390.38, 22,618.74 and 8,938.38

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Solution

The fourth proportional to 16,390.38, 22,618.74 and 8,938.38 is: 12,334.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,390.38 : 22,618.74 = 8,938.38 : x
  2. Step 2: Convert to fraction form
    16,390.38/22,618.74 = 8,938.38/x
  3. Step 3: Cross multiply
    16,390.38x = 22,618.74 × 8,938.38
  4. Step 4: Simplify right side
    16,390.38x = 202,174,893.24
  5. Step 5: Solve for x
    x = 202,174,893.24/16,390.38
  6. Step 6: Final answer
    x = 12,334.97

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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.