Home / 20,980.56-31,470.81-6,199.86

Finding the Fourth Proportional to 20,980.56, 31,470.81 and 6,199.86

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Solution

The fourth proportional to 20,980.56, 31,470.81 and 6,199.86 is: 9,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.56 : 31,470.81 = 6,199.86 : x
  2. Step 2: Convert to fraction form
    20,980.56/31,470.81 = 6,199.86/x
  3. Step 3: Cross multiply
    20,980.56x = 31,470.81 × 6,199.86
  4. Step 4: Simplify right side
    20,980.56x = 195,114,616.09
  5. Step 5: Solve for x
    x = 195,114,616.09/20,980.56
  6. Step 6: Final answer
    x = 9,299.78

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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.