Home / 20,931.24-31,396.84-5,348.86

Finding the Fourth Proportional to 20,931.24, 31,396.84 and 5,348.86

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Solution

The fourth proportional to 20,931.24, 31,396.84 and 5,348.86 is: 8,023.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.24 : 31,396.84 = 5,348.86 : x
  2. Step 2: Convert to fraction form
    20,931.24/31,396.84 = 5,348.86/x
  3. Step 3: Cross multiply
    20,931.24x = 31,396.84 × 5,348.86
  4. Step 4: Simplify right side
    20,931.24x = 167,937,301.60
  5. Step 5: Solve for x
    x = 167,937,301.60/20,931.24
  6. Step 6: Final answer
    x = 8,023.28

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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.