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Finding the Fourth Proportional to 15,911.96, 21,957.84 and 8,837.96

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Solution

The fourth proportional to 15,911.96, 21,957.84 and 8,837.96 is: 12,196.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,911.96 : 21,957.84 = 8,837.96 : x
  2. Step 2: Convert to fraction form
    15,911.96/21,957.84 = 8,837.96/x
  3. Step 3: Cross multiply
    15,911.96x = 21,957.84 × 8,837.96
  4. Step 4: Simplify right side
    15,911.96x = 194,062,511.61
  5. Step 5: Solve for x
    x = 194,062,511.61/15,911.96
  6. Step 6: Final answer
    x = 12,196.02

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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.