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Finding the Fourth Proportional to 15,927.40, 21,979.34 and 8,853.40

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Solution

The fourth proportional to 15,927.40, 21,979.34 and 8,853.40 is: 12,217.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,927.40 : 21,979.34 = 8,853.40 : x
  2. Step 2: Convert to fraction form
    15,927.40/21,979.34 = 8,853.40/x
  3. Step 3: Cross multiply
    15,927.40x = 21,979.34 × 8,853.40
  4. Step 4: Simplify right side
    15,927.40x = 194,591,888.76
  5. Step 5: Solve for x
    x = 194,591,888.76/15,927.40
  6. Step 6: Final answer
    x = 12,217.43

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.