Home / 20,831.72-28,761.19-18,589.74

Finding the Fourth Proportional to 20,831.72, 28,761.19 and 18,589.74

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Solution

The fourth proportional to 20,831.72, 28,761.19 and 18,589.74 is: 25,665.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.72 : 28,761.19 = 18,589.74 : x
  2. Step 2: Convert to fraction form
    20,831.72/28,761.19 = 18,589.74/x
  3. Step 3: Cross multiply
    20,831.72x = 28,761.19 × 18,589.74
  4. Step 4: Simplify right side
    20,831.72x = 534,662,951.24
  5. Step 5: Solve for x
    x = 534,662,951.24/20,831.72
  6. Step 6: Final answer
    x = 25,665.81

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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.