Home / 14,081.28-21,112.32-7,142.40

Finding the Fourth Proportional to 14,081.28, 21,112.32 and 7,142.40

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Solution

The fourth proportional to 14,081.28, 21,112.32 and 7,142.40 is: 10,708.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,081.28 : 21,112.32 = 7,142.40 : x
  2. Step 2: Convert to fraction form
    14,081.28/21,112.32 = 7,142.40/x
  3. Step 3: Cross multiply
    14,081.28x = 21,112.32 × 7,142.40
  4. Step 4: Simplify right side
    14,081.28x = 150,792,634.37
  5. Step 5: Solve for x
    x = 150,792,634.37/14,081.28
  6. Step 6: Final answer
    x = 10,708.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.