Home / 21,002.80-31,493.26-9,906.50

Finding the Fourth Proportional to 21,002.80, 31,493.26 and 9,906.50

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Solution

The fourth proportional to 21,002.80, 31,493.26 and 9,906.50 is: 14,854.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.80 : 31,493.26 = 9,906.50 : x
  2. Step 2: Convert to fraction form
    21,002.80/31,493.26 = 9,906.50/x
  3. Step 3: Cross multiply
    21,002.80x = 31,493.26 × 9,906.50
  4. Step 4: Simplify right side
    21,002.80x = 311,987,980.19
  5. Step 5: Solve for x
    x = 311,987,980.19/21,002.80
  6. Step 6: Final answer
    x = 14,854.59

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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.