Home / 20,659.19-30,986.15-6,620.67

Finding the Fourth Proportional to 20,659.19, 30,986.15 and 6,620.67

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Solution

The fourth proportional to 20,659.19, 30,986.15 and 6,620.67 is: 9,930.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,659.19 : 30,986.15 = 6,620.67 : x
  2. Step 2: Convert to fraction form
    20,659.19/30,986.15 = 6,620.67/x
  3. Step 3: Cross multiply
    20,659.19x = 30,986.15 × 6,620.67
  4. Step 4: Simplify right side
    20,659.19x = 205,149,040.62
  5. Step 5: Solve for x
    x = 205,149,040.62/20,659.19
  6. Step 6: Final answer
    x = 9,930.16

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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.