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Finding the Fourth Proportional to 18,513.70, 25,548.78 and 10,015.79

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Solution

The fourth proportional to 18,513.70, 25,548.78 and 10,015.79 is: 13,821.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.70 : 25,548.78 = 10,015.79 : x
  2. Step 2: Convert to fraction form
    18,513.70/25,548.78 = 10,015.79/x
  3. Step 3: Cross multiply
    18,513.70x = 25,548.78 × 10,015.79
  4. Step 4: Simplify right side
    18,513.70x = 255,891,087.49
  5. Step 5: Solve for x
    x = 255,891,087.49/18,513.70
  6. Step 6: Final answer
    x = 13,821.72

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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.