Home / 49,920.66-74,860.20-20,318.40

Finding the Fourth Proportional to 49,920.66, 74,860.20 and 20,318.40

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Solution

The fourth proportional to 49,920.66, 74,860.20 and 20,318.40 is: 30,469.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    49,920.66 : 74,860.20 = 20,318.40 : x
  2. Step 2: Convert to fraction form
    49,920.66/74,860.20 = 20,318.40/x
  3. Step 3: Cross multiply
    49,920.66x = 74,860.20 × 20,318.40
  4. Step 4: Simplify right side
    49,920.66x = 1,521,039,487.68
  5. Step 5: Solve for x
    x = 1,521,039,487.68/49,920.66
  6. Step 6: Final answer
    x = 30,469.14

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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.