Home / 20,699.85-31,054.95-6,661.20

Finding the Fourth Proportional to 20,699.85, 31,054.95 and 6,661.20

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Solution

The fourth proportional to 20,699.85, 31,054.95 and 6,661.20 is: 9,993.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,699.85 : 31,054.95 = 6,661.20 : x
  2. Step 2: Convert to fraction form
    20,699.85/31,054.95 = 6,661.20/x
  3. Step 3: Cross multiply
    20,699.85x = 31,054.95 × 6,661.20
  4. Step 4: Simplify right side
    20,699.85x = 206,863,232.94
  5. Step 5: Solve for x
    x = 206,863,232.94/20,699.85
  6. Step 6: Final answer
    x = 9,993.47

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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.