Home / 20,790.08-31,170.88-7,462.78

Finding the Fourth Proportional to 20,790.08, 31,170.88 and 7,462.78

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Solution

The fourth proportional to 20,790.08, 31,170.88 and 7,462.78 is: 11,189.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.08 : 31,170.88 = 7,462.78 : x
  2. Step 2: Convert to fraction form
    20,790.08/31,170.88 = 7,462.78/x
  3. Step 3: Cross multiply
    20,790.08x = 31,170.88 × 7,462.78
  4. Step 4: Simplify right side
    20,790.08x = 232,621,226.68
  5. Step 5: Solve for x
    x = 232,621,226.68/20,790.08
  6. Step 6: Final answer
    x = 11,189.05

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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.