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Finding the Fourth Proportional to 12,200.60, 18,300.90 and 10,742.60

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Solution

The fourth proportional to 12,200.60, 18,300.90 and 10,742.60 is: 16,113.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,200.60 : 18,300.90 = 10,742.60 : x
  2. Step 2: Convert to fraction form
    12,200.60/18,300.90 = 10,742.60/x
  3. Step 3: Cross multiply
    12,200.60x = 18,300.90 × 10,742.60
  4. Step 4: Simplify right side
    12,200.60x = 196,599,248.34
  5. Step 5: Solve for x
    x = 196,599,248.34/12,200.60
  6. Step 6: Final answer
    x = 16,113.90

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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.