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Finding the Fourth Proportional to 8,436.76, 11,636.44 and 7,480.79

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Solution

The fourth proportional to 8,436.76, 11,636.44 and 7,480.79 is: 10,317.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,436.76 : 11,636.44 = 7,480.79 : x
  2. Step 2: Convert to fraction form
    8,436.76/11,636.44 = 7,480.79/x
  3. Step 3: Cross multiply
    8,436.76x = 11,636.44 × 7,480.79
  4. Step 4: Simplify right side
    8,436.76x = 87,049,763.99
  5. Step 5: Solve for x
    x = 87,049,763.99/8,436.76
  6. Step 6: Final answer
    x = 10,317.91

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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.