Home / 20,790.86-28,700.82-13,247.54

Finding the Fourth Proportional to 20,790.86, 28,700.82 and 13,247.54

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Solution

The fourth proportional to 20,790.86, 28,700.82 and 13,247.54 is: 18,287.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.86 : 28,700.82 = 13,247.54 : x
  2. Step 2: Convert to fraction form
    20,790.86/28,700.82 = 13,247.54/x
  3. Step 3: Cross multiply
    20,790.86x = 28,700.82 × 13,247.54
  4. Step 4: Simplify right side
    20,790.86x = 380,215,117.48
  5. Step 5: Solve for x
    x = 380,215,117.48/20,790.86
  6. Step 6: Final answer
    x = 18,287.61

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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.