Home / 20,900.30-31,350.27-5,317.88

Finding the Fourth Proportional to 20,900.30, 31,350.27 and 5,317.88

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Solution

The fourth proportional to 20,900.30, 31,350.27 and 5,317.88 is: 7,976.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,900.30 : 31,350.27 = 5,317.88 : x
  2. Step 2: Convert to fraction form
    20,900.30/31,350.27 = 5,317.88/x
  3. Step 3: Cross multiply
    20,900.30x = 31,350.27 × 5,317.88
  4. Step 4: Simplify right side
    20,900.30x = 166,716,973.83
  5. Step 5: Solve for x
    x = 166,716,973.83/20,900.30
  6. Step 6: Final answer
    x = 7,976.77

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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.