Home / 20,515.50-30,777.59-6,665.58

Finding the Fourth Proportional to 20,515.50, 30,777.59 and 6,665.58

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Solution

The fourth proportional to 20,515.50, 30,777.59 and 6,665.58 is: 9,999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,515.50 : 30,777.59 = 6,665.58 : x
  2. Step 2: Convert to fraction form
    20,515.50/30,777.59 = 6,665.58/x
  3. Step 3: Cross multiply
    20,515.50x = 30,777.59 × 6,665.58
  4. Step 4: Simplify right side
    20,515.50x = 205,150,488.35
  5. Step 5: Solve for x
    x = 205,150,488.35/20,515.50
  6. Step 6: Final answer
    x = 9,999.78

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1.5x scale

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.