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Finding the Fourth Proportional to 18,645.69, 25,730.28 and 10,687.44

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Solution

The fourth proportional to 18,645.69, 25,730.28 and 10,687.44 is: 14,748.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.69 : 25,730.28 = 10,687.44 : x
  2. Step 2: Convert to fraction form
    18,645.69/25,730.28 = 10,687.44/x
  3. Step 3: Cross multiply
    18,645.69x = 25,730.28 × 10,687.44
  4. Step 4: Simplify right side
    18,645.69x = 274,990,823.68
  5. Step 5: Solve for x
    x = 274,990,823.68/18,645.69
  6. Step 6: Final answer
    x = 14,748.22

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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.