Home / 20,720.64-31,023.36-16,112.64

Finding the Fourth Proportional to 20,720.64, 31,023.36 and 16,112.64

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Solution

The fourth proportional to 20,720.64, 31,023.36 and 16,112.64 is: 24,124.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.64 : 31,023.36 = 16,112.64 : x
  2. Step 2: Convert to fraction form
    20,720.64/31,023.36 = 16,112.64/x
  3. Step 3: Cross multiply
    20,720.64x = 31,023.36 × 16,112.64
  4. Step 4: Simplify right side
    20,720.64x = 499,868,231.27
  5. Step 5: Solve for x
    x = 499,868,231.27/20,720.64
  6. Step 6: Final answer
    x = 24,124.17

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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.