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Finding the Fourth Proportional to 15,063.76, 20,787.79 and 8,349.25

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Solution

The fourth proportional to 15,063.76, 20,787.79 and 8,349.25 is: 11,521.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,063.76 : 20,787.79 = 8,349.25 : x
  2. Step 2: Convert to fraction form
    15,063.76/20,787.79 = 8,349.25/x
  3. Step 3: Cross multiply
    15,063.76x = 20,787.79 × 8,349.25
  4. Step 4: Simplify right side
    15,063.76x = 173,562,309.97
  5. Step 5: Solve for x
    x = 173,562,309.97/15,063.76
  6. Step 6: Final answer
    x = 11,521.85

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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.