Home / 20,663.85-30,980.59-6,615.77

Finding the Fourth Proportional to 20,663.85, 30,980.59 and 6,615.77

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Solution

The fourth proportional to 20,663.85, 30,980.59 and 6,615.77 is: 9,918.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.85 : 30,980.59 = 6,615.77 : x
  2. Step 2: Convert to fraction form
    20,663.85/30,980.59 = 6,615.77/x
  3. Step 3: Cross multiply
    20,663.85x = 30,980.59 × 6,615.77
  4. Step 4: Simplify right side
    20,663.85x = 204,960,286.46
  5. Step 5: Solve for x
    x = 204,960,286.46/20,663.85
  6. Step 6: Final answer
    x = 9,918.79

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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.