Home / 20,856.44-31,255.44-11,500.87

Finding the Fourth Proportional to 20,856.44, 31,255.44 and 11,500.87

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Solution

The fourth proportional to 20,856.44, 31,255.44 and 11,500.87 is: 17,235.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.44 : 31,255.44 = 11,500.87 : x
  2. Step 2: Convert to fraction form
    20,856.44/31,255.44 = 11,500.87/x
  3. Step 3: Cross multiply
    20,856.44x = 31,255.44 × 11,500.87
  4. Step 4: Simplify right side
    20,856.44x = 359,464,689.57
  5. Step 5: Solve for x
    x = 359,464,689.57/20,856.44
  6. Step 6: Final answer
    x = 17,235.19

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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.