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Finding the Fourth Proportional to 20,344.60, 30,492.60 and 10,478.80

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Solution

The fourth proportional to 20,344.60, 30,492.60 and 10,478.80 is: 15,705.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,344.60 : 30,492.60 = 10,478.80 : x
  2. Step 2: Convert to fraction form
    20,344.60/30,492.60 = 10,478.80/x
  3. Step 3: Cross multiply
    20,344.60x = 30,492.60 × 10,478.80
  4. Step 4: Simplify right side
    20,344.60x = 319,525,856.88
  5. Step 5: Solve for x
    x = 319,525,856.88/20,344.60
  6. Step 6: Final answer
    x = 15,705.68

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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.