Home / 20,828.85-31,243.27-5,247.69

Finding the Fourth Proportional to 20,828.85, 31,243.27 and 5,247.69

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Solution

The fourth proportional to 20,828.85, 31,243.27 and 5,247.69 is: 7,871.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.85 : 31,243.27 = 5,247.69 : x
  2. Step 2: Convert to fraction form
    20,828.85/31,243.27 = 5,247.69/x
  3. Step 3: Cross multiply
    20,828.85x = 31,243.27 × 5,247.69
  4. Step 4: Simplify right side
    20,828.85x = 163,954,995.55
  5. Step 5: Solve for x
    x = 163,954,995.55/20,828.85
  6. Step 6: Final answer
    x = 7,871.53

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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.