Home / 15,112.42-20,831.70-12,873.58

Finding the Fourth Proportional to 15,112.42, 20,831.70 and 12,873.58

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Solution

The fourth proportional to 15,112.42, 20,831.70 and 12,873.58 is: 17,745.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.42 : 20,831.70 = 12,873.58 : x
  2. Step 2: Convert to fraction form
    15,112.42/20,831.70 = 12,873.58/x
  3. Step 3: Cross multiply
    15,112.42x = 20,831.70 × 12,873.58
  4. Step 4: Simplify right side
    15,112.42x = 268,178,556.49
  5. Step 5: Solve for x
    x = 268,178,556.49/15,112.42
  6. Step 6: Final answer
    x = 17,745.57

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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.