Home / 20,765.16-31,150.86-6,720.52

Finding the Fourth Proportional to 20,765.16, 31,150.86 and 6,720.52

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Solution

The fourth proportional to 20,765.16, 31,150.86 and 6,720.52 is: 10,081.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.16 : 31,150.86 = 6,720.52 : x
  2. Step 2: Convert to fraction form
    20,765.16/31,150.86 = 6,720.52/x
  3. Step 3: Cross multiply
    20,765.16x = 31,150.86 × 6,720.52
  4. Step 4: Simplify right side
    20,765.16x = 209,349,977.65
  5. Step 5: Solve for x
    x = 209,349,977.65/20,765.16
  6. Step 6: Final answer
    x = 10,081.79

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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.