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Finding the Fourth Proportional to 18,362.84, 25,340.72 and 9,979.34

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Solution

The fourth proportional to 18,362.84, 25,340.72 and 9,979.34 is: 13,771.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,362.84 : 25,340.72 = 9,979.34 : x
  2. Step 2: Convert to fraction form
    18,362.84/25,340.72 = 9,979.34/x
  3. Step 3: Cross multiply
    18,362.84x = 25,340.72 × 9,979.34
  4. Step 4: Simplify right side
    18,362.84x = 252,883,660.72
  5. Step 5: Solve for x
    x = 252,883,660.72/18,362.84
  6. Step 6: Final answer
    x = 13,771.49

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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.