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Finding the Fourth Proportional to 20,244.60, 30,342.60 and 10,378.80

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Solution

The fourth proportional to 20,244.60, 30,342.60 and 10,378.80 is: 15,555.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,244.60 : 30,342.60 = 10,378.80 : x
  2. Step 2: Convert to fraction form
    20,244.60/30,342.60 = 10,378.80/x
  3. Step 3: Cross multiply
    20,244.60x = 30,342.60 × 10,378.80
  4. Step 4: Simplify right side
    20,244.60x = 314,919,776.88
  5. Step 5: Solve for x
    x = 314,919,776.88/20,244.60
  6. Step 6: Final answer
    x = 15,555.74

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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.