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Finding the Fourth Proportional to 12,015.59, 18,016.64 and 4,990.88

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Solution

The fourth proportional to 12,015.59, 18,016.64 and 4,990.88 is: 7,483.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.59 : 18,016.64 = 4,990.88 : x
  2. Step 2: Convert to fraction form
    12,015.59/18,016.64 = 4,990.88/x
  3. Step 3: Cross multiply
    12,015.59x = 18,016.64 × 4,990.88
  4. Step 4: Simplify right side
    12,015.59x = 89,918,773.21
  5. Step 5: Solve for x
    x = 89,918,773.21/12,015.59
  6. Step 6: Final answer
    x = 7,483.51

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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.