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Finding the Fourth Proportional to 30,167.96, 45,254.24 and 7,980.75

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Solution

The fourth proportional to 30,167.96, 45,254.24 and 7,980.75 is: 11,971.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,167.96 : 45,254.24 = 7,980.75 : x
  2. Step 2: Convert to fraction form
    30,167.96/45,254.24 = 7,980.75/x
  3. Step 3: Cross multiply
    30,167.96x = 45,254.24 × 7,980.75
  4. Step 4: Simplify right side
    30,167.96x = 361,162,735.98
  5. Step 5: Solve for x
    x = 361,162,735.98/30,167.96
  6. Step 6: Final answer
    x = 11,971.73

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.