Home / 15,905.08-21,949.14-8,831.62

Finding the Fourth Proportional to 15,905.08, 21,949.14 and 8,831.62

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Solution

The fourth proportional to 15,905.08, 21,949.14 and 8,831.62 is: 12,187.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,905.08 : 21,949.14 = 8,831.62 : x
  2. Step 2: Convert to fraction form
    15,905.08/21,949.14 = 8,831.62/x
  3. Step 3: Cross multiply
    15,905.08x = 21,949.14 × 8,831.62
  4. Step 4: Simplify right side
    15,905.08x = 193,846,463.81
  5. Step 5: Solve for x
    x = 193,846,463.81/15,905.08
  6. Step 6: Final answer
    x = 12,187.71

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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.