Home / 12,015.70-18,018.78-4,991.02

Finding the Fourth Proportional to 12,015.70, 18,018.78 and 4,991.02

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Solution

The fourth proportional to 12,015.70, 18,018.78 and 4,991.02 is: 7,484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.70 : 18,018.78 = 4,991.02 : x
  2. Step 2: Convert to fraction form
    12,015.70/18,018.78 = 4,991.02/x
  3. Step 3: Cross multiply
    12,015.70x = 18,018.78 × 4,991.02
  4. Step 4: Simplify right side
    12,015.70x = 89,932,091.36
  5. Step 5: Solve for x
    x = 89,932,091.36/12,015.70
  6. Step 6: Final answer
    x = 7,484.55

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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.