Home / 20,166.90-27,831.48-11,215.38

Finding the Fourth Proportional to 20,166.90, 27,831.48 and 11,215.38

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Solution

The fourth proportional to 20,166.90, 27,831.48 and 11,215.38 is: 15,477.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,166.90 : 27,831.48 = 11,215.38 : x
  2. Step 2: Convert to fraction form
    20,166.90/27,831.48 = 11,215.38/x
  3. Step 3: Cross multiply
    20,166.90x = 27,831.48 × 11,215.38
  4. Step 4: Simplify right side
    20,166.90x = 312,140,624.16
  5. Step 5: Solve for x
    x = 312,140,624.16/20,166.90
  6. Step 6: Final answer
    x = 15,477.87

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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.