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Finding the Fourth Proportional to 15,886.18, 21,923.97 and 8,813.38

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Solution

The fourth proportional to 15,886.18, 21,923.97 and 8,813.38 is: 12,163.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,886.18 : 21,923.97 = 8,813.38 : x
  2. Step 2: Convert to fraction form
    15,886.18/21,923.97 = 8,813.38/x
  3. Step 3: Cross multiply
    15,886.18x = 21,923.97 × 8,813.38
  4. Step 4: Simplify right side
    15,886.18x = 193,224,278.72
  5. Step 5: Solve for x
    x = 193,224,278.72/15,886.18
  6. Step 6: Final answer
    x = 12,163.04

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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.