Home / 20,790.28-31,187.52-6,749.72

Finding the Fourth Proportional to 20,790.28, 31,187.52 and 6,749.72

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Solution

The fourth proportional to 20,790.28, 31,187.52 and 6,749.72 is: 10,125.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.28 : 31,187.52 = 6,749.72 : x
  2. Step 2: Convert to fraction form
    20,790.28/31,187.52 = 6,749.72/x
  3. Step 3: Cross multiply
    20,790.28x = 31,187.52 × 6,749.72
  4. Step 4: Simplify right side
    20,790.28x = 210,507,027.49
  5. Step 5: Solve for x
    x = 210,507,027.49/20,790.28
  6. Step 6: Final answer
    x = 10,125.26

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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.