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Finding the Fourth Proportional to 15,894.42, 21,935.78 and 8,823.12

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Solution

The fourth proportional to 15,894.42, 21,935.78 and 8,823.12 is: 12,176.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.42 : 21,935.78 = 8,823.12 : x
  2. Step 2: Convert to fraction form
    15,894.42/21,935.78 = 8,823.12/x
  3. Step 3: Cross multiply
    15,894.42x = 21,935.78 × 8,823.12
  4. Step 4: Simplify right side
    15,894.42x = 193,542,019.23
  5. Step 5: Solve for x
    x = 193,542,019.23/15,894.42
  6. Step 6: Final answer
    x = 12,176.73

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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.