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Finding the Fourth Proportional to 15,894.41, 21,934.53 and 8,820.86

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Solution

The fourth proportional to 15,894.41, 21,934.53 and 8,820.86 is: 12,172.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,894.41 : 21,934.53 = 8,820.86 : x
  2. Step 2: Convert to fraction form
    15,894.41/21,934.53 = 8,820.86/x
  3. Step 3: Cross multiply
    15,894.41x = 21,934.53 × 8,820.86
  4. Step 4: Simplify right side
    15,894.41x = 193,481,308.62
  5. Step 5: Solve for x
    x = 193,481,308.62/15,894.41
  6. Step 6: Final answer
    x = 12,172.92

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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.