Home / 20,831.20-28,760.48-18,589.22

Finding the Fourth Proportional to 20,831.20, 28,760.48 and 18,589.22

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Solution

The fourth proportional to 20,831.20, 28,760.48 and 18,589.22 is: 25,665.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.20 : 28,760.48 = 18,589.22 : x
  2. Step 2: Convert to fraction form
    20,831.20/28,760.48 = 18,589.22/x
  3. Step 3: Cross multiply
    20,831.20x = 28,760.48 × 18,589.22
  4. Step 4: Simplify right side
    20,831.20x = 534,634,890.03
  5. Step 5: Solve for x
    x = 534,634,890.03/20,831.20
  6. Step 6: Final answer
    x = 25,665.10

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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.