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Finding the Fourth Proportional to 15,894.76, 21,934.94 and 8,821.84

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Solution

The fourth proportional to 15,894.76, 21,934.94 and 8,821.84 is: 12,174.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.76 : 21,934.94 = 8,821.84 : x
  2. Step 2: Convert to fraction form
    15,894.76/21,934.94 = 8,821.84/x
  3. Step 3: Cross multiply
    15,894.76x = 21,934.94 × 8,821.84
  4. Step 4: Simplify right side
    15,894.76x = 193,506,531.09
  5. Step 5: Solve for x
    x = 193,506,531.09/15,894.76
  6. Step 6: Final answer
    x = 12,174.23

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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.