Home / 20,831.09-28,746.18-11,881.47

Finding the Fourth Proportional to 20,831.09, 28,746.18 and 11,881.47

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Solution

The fourth proportional to 20,831.09, 28,746.18 and 11,881.47 is: 16,396.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.09 : 28,746.18 = 11,881.47 : x
  2. Step 2: Convert to fraction form
    20,831.09/28,746.18 = 11,881.47/x
  3. Step 3: Cross multiply
    20,831.09x = 28,746.18 × 11,881.47
  4. Step 4: Simplify right side
    20,831.09x = 341,546,919.84
  5. Step 5: Solve for x
    x = 341,546,919.84/20,831.09
  6. Step 6: Final answer
    x = 16,396.02

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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.