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Finding the Fourth Proportional to 15,994.79, 22,072.75 and 8,921.21

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Solution

The fourth proportional to 15,994.79, 22,072.75 and 8,921.21 is: 12,311.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,994.79 : 22,072.75 = 8,921.21 : x
  2. Step 2: Convert to fraction form
    15,994.79/22,072.75 = 8,921.21/x
  3. Step 3: Cross multiply
    15,994.79x = 22,072.75 × 8,921.21
  4. Step 4: Simplify right side
    15,994.79x = 196,915,555.54
  5. Step 5: Solve for x
    x = 196,915,555.54/15,994.79
  6. Step 6: Final answer
    x = 12,311.23

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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.