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Finding the Fourth Proportional to 12,125.60, 18,166.80 and 7,503.20

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Solution

The fourth proportional to 12,125.60, 18,166.80 and 7,503.20 is: 11,241.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.60 : 18,166.80 = 7,503.20 : x
  2. Step 2: Convert to fraction form
    12,125.60/18,166.80 = 7,503.20/x
  3. Step 3: Cross multiply
    12,125.60x = 18,166.80 × 7,503.20
  4. Step 4: Simplify right side
    12,125.60x = 136,309,133.76
  5. Step 5: Solve for x
    x = 136,309,133.76/12,125.60
  6. Step 6: Final answer
    x = 11,241.43

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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.