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Finding the Fourth Proportional to 18,358.34, 25,334.61 and 10,805

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Solution

The fourth proportional to 18,358.34, 25,334.61 and 10,805 is: 14,910.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,358.34 : 25,334.61 = 10,805 : x
  2. Step 2: Convert to fraction form
    18,358.34/25,334.61 = 10,805/x
  3. Step 3: Cross multiply
    18,358.34x = 25,334.61 × 10,805
  4. Step 4: Simplify right side
    18,358.34x = 273,740,461.05
  5. Step 5: Solve for x
    x = 273,740,461.05/18,358.34
  6. Step 6: Final answer
    x = 14,910.96

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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.