Home / 18,515.58-27,729.21-11,831.07

Finding the Fourth Proportional to 18,515.58, 27,729.21 and 11,831.07

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Solution

The fourth proportional to 18,515.58, 27,729.21 and 11,831.07 is: 17,718.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.58 : 27,729.21 = 11,831.07 : x
  2. Step 2: Convert to fraction form
    18,515.58/27,729.21 = 11,831.07/x
  3. Step 3: Cross multiply
    18,515.58x = 27,729.21 × 11,831.07
  4. Step 4: Simplify right side
    18,515.58x = 328,066,026.75
  5. Step 5: Solve for x
    x = 328,066,026.75/18,515.58
  6. Step 6: Final answer
    x = 17,718.38

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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.