Home / 12,007.85-18,016.78-4,989.40

Finding the Fourth Proportional to 12,007.85, 18,016.78 and 4,989.40

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Solution

The fourth proportional to 12,007.85, 18,016.78 and 4,989.40 is: 7,486.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,007.85 : 18,016.78 = 4,989.40 : x
  2. Step 2: Convert to fraction form
    12,007.85/18,016.78 = 4,989.40/x
  3. Step 3: Cross multiply
    12,007.85x = 18,016.78 × 4,989.40
  4. Step 4: Simplify right side
    12,007.85x = 89,892,873.97
  5. Step 5: Solve for x
    x = 89,892,873.97/12,007.85
  6. Step 6: Final answer
    x = 7,486.18

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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.