Home / 20,831.28-28,746.06-11,398.02

Finding the Fourth Proportional to 20,831.28, 28,746.06 and 11,398.02

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Solution

The fourth proportional to 20,831.28, 28,746.06 and 11,398.02 is: 15,728.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.28 : 28,746.06 = 11,398.02 : x
  2. Step 2: Convert to fraction form
    20,831.28/28,746.06 = 11,398.02/x
  3. Step 3: Cross multiply
    20,831.28x = 28,746.06 × 11,398.02
  4. Step 4: Simplify right side
    20,831.28x = 327,648,166.80
  5. Step 5: Solve for x
    x = 327,648,166.80/20,831.28
  6. Step 6: Final answer
    x = 15,728.66

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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.