Home / 20,760.81-28,650.02-11,329.57

Finding the Fourth Proportional to 20,760.81, 28,650.02 and 11,329.57

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Solution

The fourth proportional to 20,760.81, 28,650.02 and 11,329.57 is: 15,634.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.81 : 28,650.02 = 11,329.57 : x
  2. Step 2: Convert to fraction form
    20,760.81/28,650.02 = 11,329.57/x
  3. Step 3: Cross multiply
    20,760.81x = 28,650.02 × 11,329.57
  4. Step 4: Simplify right side
    20,760.81x = 324,592,407.09
  5. Step 5: Solve for x
    x = 324,592,407.09/20,760.81
  6. Step 6: Final answer
    x = 15,634.86

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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.