Home / 21,831.60-30,138.96-16,975.56

Finding the Fourth Proportional to 21,831.60, 30,138.96 and 16,975.56

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Solution

The fourth proportional to 21,831.60, 30,138.96 and 16,975.56 is: 23,435.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.60 : 30,138.96 = 16,975.56 : x
  2. Step 2: Convert to fraction form
    21,831.60/30,138.96 = 16,975.56/x
  3. Step 3: Cross multiply
    21,831.60x = 30,138.96 × 16,975.56
  4. Step 4: Simplify right side
    21,831.60x = 511,625,723.82
  5. Step 5: Solve for x
    x = 511,625,723.82/21,831.60
  6. Step 6: Final answer
    x = 23,435.10

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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.