Home / 15,905.41-21,949.71-8,831.90

Finding the Fourth Proportional to 15,905.41, 21,949.71 and 8,831.90

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Solution

The fourth proportional to 15,905.41, 21,949.71 and 8,831.90 is: 12,188.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.41 : 21,949.71 = 8,831.90 : x
  2. Step 2: Convert to fraction form
    15,905.41/21,949.71 = 8,831.90/x
  3. Step 3: Cross multiply
    15,905.41x = 21,949.71 × 8,831.90
  4. Step 4: Simplify right side
    15,905.41x = 193,857,643.75
  5. Step 5: Solve for x
    x = 193,857,643.75/15,905.41
  6. Step 6: Final answer
    x = 12,188.16

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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.