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Finding the Fourth Proportional to 18,645.53, 25,730.76 and 10,147.49

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Solution

The fourth proportional to 18,645.53, 25,730.76 and 10,147.49 is: 14,003.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.53 : 25,730.76 = 10,147.49 : x
  2. Step 2: Convert to fraction form
    18,645.53/25,730.76 = 10,147.49/x
  3. Step 3: Cross multiply
    18,645.53x = 25,730.76 × 10,147.49
  4. Step 4: Simplify right side
    18,645.53x = 261,102,694.12
  5. Step 5: Solve for x
    x = 261,102,694.12/18,645.53
  6. Step 6: Final answer
    x = 14,003.50

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Half scale
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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.