Home / 20,378.29-30,568.47-7,231.69

Finding the Fourth Proportional to 20,378.29, 30,568.47 and 7,231.69

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Solution

The fourth proportional to 20,378.29, 30,568.47 and 7,231.69 is: 10,847.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,378.29 : 30,568.47 = 7,231.69 : x
  2. Step 2: Convert to fraction form
    20,378.29/30,568.47 = 7,231.69/x
  3. Step 3: Cross multiply
    20,378.29x = 30,568.47 × 7,231.69
  4. Step 4: Simplify right side
    20,378.29x = 221,061,509.81
  5. Step 5: Solve for x
    x = 221,061,509.81/20,378.29
  6. Step 6: Final answer
    x = 10,847.89

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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.