Home / 20,899.20-31,348.80-6,107.52

Finding the Fourth Proportional to 20,899.20, 31,348.80 and 6,107.52

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Solution

The fourth proportional to 20,899.20, 31,348.80 and 6,107.52 is: 9,161.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,899.20 : 31,348.80 = 6,107.52 : x
  2. Step 2: Convert to fraction form
    20,899.20/31,348.80 = 6,107.52/x
  3. Step 3: Cross multiply
    20,899.20x = 31,348.80 × 6,107.52
  4. Step 4: Simplify right side
    20,899.20x = 191,463,422.98
  5. Step 5: Solve for x
    x = 191,463,422.98/20,899.20
  6. Step 6: Final answer
    x = 9,161.28

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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.