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Finding the Fourth Proportional to 15,894.73, 21,934.74 and 8,821.16

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Solution

The fourth proportional to 15,894.73, 21,934.74 and 8,821.16 is: 12,173.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.73 : 21,934.74 = 8,821.16 : x
  2. Step 2: Convert to fraction form
    15,894.73/21,934.74 = 8,821.16/x
  3. Step 3: Cross multiply
    15,894.73x = 21,934.74 × 8,821.16
  4. Step 4: Simplify right side
    15,894.73x = 193,489,851.10
  5. Step 5: Solve for x
    x = 193,489,851.10/15,894.73
  6. Step 6: Final answer
    x = 12,173.21

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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.