Home / 20,742.24-28,624.20-11,310.81

Finding the Fourth Proportional to 20,742.24, 28,624.20 and 11,310.81

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Solution

The fourth proportional to 20,742.24, 28,624.20 and 11,310.81 is: 15,608.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.24 : 28,624.20 = 11,310.81 : x
  2. Step 2: Convert to fraction form
    20,742.24/28,624.20 = 11,310.81/x
  3. Step 3: Cross multiply
    20,742.24x = 28,624.20 × 11,310.81
  4. Step 4: Simplify right side
    20,742.24x = 323,762,887.60
  5. Step 5: Solve for x
    x = 323,762,887.60/20,742.24
  6. Step 6: Final answer
    x = 15,608.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.