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Finding the Fourth Proportional to 14,778.82, 20,394.63 and 8,064.39

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Solution

The fourth proportional to 14,778.82, 20,394.63 and 8,064.39 is: 11,128.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.82 : 20,394.63 = 8,064.39 : x
  2. Step 2: Convert to fraction form
    14,778.82/20,394.63 = 8,064.39/x
  3. Step 3: Cross multiply
    14,778.82x = 20,394.63 × 8,064.39
  4. Step 4: Simplify right side
    14,778.82x = 164,470,278.02
  5. Step 5: Solve for x
    x = 164,470,278.02/14,778.82
  6. Step 6: Final answer
    x = 11,128.78

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Half scale
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Double scale
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Similar ratio
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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.