Home / 20,831.76-31,247.28-5,249.16

Finding the Fourth Proportional to 20,831.76, 31,247.28 and 5,249.16

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Solution

The fourth proportional to 20,831.76, 31,247.28 and 5,249.16 is: 7,873.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.76 : 31,247.28 = 5,249.16 : x
  2. Step 2: Convert to fraction form
    20,831.76/31,247.28 = 5,249.16/x
  3. Step 3: Cross multiply
    20,831.76x = 31,247.28 × 5,249.16
  4. Step 4: Simplify right side
    20,831.76x = 164,021,972.28
  5. Step 5: Solve for x
    x = 164,021,972.28/20,831.76
  6. Step 6: Final answer
    x = 7,873.65

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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.