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Finding the Fourth Proportional to 28,205.82, 42,300.21 and 8,479.14

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Solution

The fourth proportional to 28,205.82, 42,300.21 and 8,479.14 is: 12,716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,205.82 : 42,300.21 = 8,479.14 : x
  2. Step 2: Convert to fraction form
    28,205.82/42,300.21 = 8,479.14/x
  3. Step 3: Cross multiply
    28,205.82x = 42,300.21 × 8,479.14
  4. Step 4: Simplify right side
    28,205.82x = 358,669,402.62
  5. Step 5: Solve for x
    x = 358,669,402.62/28,205.82
  6. Step 6: Final answer
    x = 12,716.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.