Home / 12,318.28-18,479.16-3,995.50

Finding the Fourth Proportional to 12,318.28, 18,479.16 and 3,995.50

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Solution

The fourth proportional to 12,318.28, 18,479.16 and 3,995.50 is: 5,993.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,318.28 : 18,479.16 = 3,995.50 : x
  2. Step 2: Convert to fraction form
    12,318.28/18,479.16 = 3,995.50/x
  3. Step 3: Cross multiply
    12,318.28x = 18,479.16 × 3,995.50
  4. Step 4: Simplify right side
    12,318.28x = 73,833,483.78
  5. Step 5: Solve for x
    x = 73,833,483.78/12,318.28
  6. Step 6: Final answer
    x = 5,993.81

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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.