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Finding the Fourth Proportional to 14,778.61, 20,394.31 and 8,064.09

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Solution

The fourth proportional to 14,778.61, 20,394.31 and 8,064.09 is: 11,128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,778.61 : 20,394.31 = 8,064.09 : x
  2. Step 2: Convert to fraction form
    14,778.61/20,394.31 = 8,064.09/x
  3. Step 3: Cross multiply
    14,778.61x = 20,394.31 × 8,064.09
  4. Step 4: Simplify right side
    14,778.61x = 164,461,551.33
  5. Step 5: Solve for x
    x = 164,461,551.33/14,778.61
  6. Step 6: Final answer
    x = 11,128.35

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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.