Home / 20,921.64-31,382.45-5,339.27

Finding the Fourth Proportional to 20,921.64, 31,382.45 and 5,339.27

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Solution

The fourth proportional to 20,921.64, 31,382.45 and 5,339.27 is: 8,008.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.64 : 31,382.45 = 5,339.27 : x
  2. Step 2: Convert to fraction form
    20,921.64/31,382.45 = 5,339.27/x
  3. Step 3: Cross multiply
    20,921.64x = 31,382.45 × 5,339.27
  4. Step 4: Simplify right side
    20,921.64x = 167,559,268.66
  5. Step 5: Solve for x
    x = 167,559,268.66/20,921.64
  6. Step 6: Final answer
    x = 8,008.90

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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.