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Finding the Fourth Proportional to 31,992.80, 48,010.80 and 18,831.20

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Solution

The fourth proportional to 31,992.80, 48,010.80 and 18,831.20 is: 28,259.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,992.80 : 48,010.80 = 18,831.20 : x
  2. Step 2: Convert to fraction form
    31,992.80/48,010.80 = 18,831.20/x
  3. Step 3: Cross multiply
    31,992.80x = 48,010.80 × 18,831.20
  4. Step 4: Simplify right side
    31,992.80x = 904,100,976.96
  5. Step 5: Solve for x
    x = 904,100,976.96/31,992.80
  6. Step 6: Final answer
    x = 28,259.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.