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Finding the Fourth Proportional to 18,363.90, 25,344.34 and 10,911.90

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Solution

The fourth proportional to 18,363.90, 25,344.34 and 10,911.90 is: 15,059.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,363.90 : 25,344.34 = 10,911.90 : x
  2. Step 2: Convert to fraction form
    18,363.90/25,344.34 = 10,911.90/x
  3. Step 3: Cross multiply
    18,363.90x = 25,344.34 × 10,911.90
  4. Step 4: Simplify right side
    18,363.90x = 276,554,903.65
  5. Step 5: Solve for x
    x = 276,554,903.65/18,363.90
  6. Step 6: Final answer
    x = 15,059.70

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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.