Home / 15,120.25-20,862.89-8,831.41

Finding the Fourth Proportional to 15,120.25, 20,862.89 and 8,831.41

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Solution

The fourth proportional to 15,120.25, 20,862.89 and 8,831.41 is: 12,185.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.25 : 20,862.89 = 8,831.41 : x
  2. Step 2: Convert to fraction form
    15,120.25/20,862.89 = 8,831.41/x
  3. Step 3: Cross multiply
    15,120.25x = 20,862.89 × 8,831.41
  4. Step 4: Simplify right side
    15,120.25x = 184,248,735.37
  5. Step 5: Solve for x
    x = 184,248,735.37/15,120.25
  6. Step 6: Final answer
    x = 12,185.56

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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.