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Finding the Fourth Proportional to 20,744.76, 28,627.50 and 11,313.12

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Solution

The fourth proportional to 20,744.76, 28,627.50 and 11,313.12 is: 15,611.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.76 : 28,627.50 = 11,313.12 : x
  2. Step 2: Convert to fraction form
    20,744.76/28,627.50 = 11,313.12/x
  3. Step 3: Cross multiply
    20,744.76x = 28,627.50 × 11,313.12
  4. Step 4: Simplify right side
    20,744.76x = 323,866,342.80
  5. Step 5: Solve for x
    x = 323,866,342.80/20,744.76
  6. Step 6: Final answer
    x = 15,611.96

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Half scale
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Double 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.