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Finding the Fourth Proportional to 51,221, 76,861.74 and 21,636.92

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Solution

The fourth proportional to 51,221, 76,861.74 and 21,636.92 is: 32,468.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,221 : 76,861.74 = 21,636.92 : x
  2. Step 2: Convert to fraction form
    51,221/76,861.74 = 21,636.92/x
  3. Step 3: Cross multiply
    51,221x = 76,861.74 × 21,636.92
  4. Step 4: Simplify right side
    51,221x = 1,663,051,319.44
  5. Step 5: Solve for x
    x = 1,663,051,319.44/51,221
  6. Step 6: Final answer
    x = 32,468.15

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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.