Home / 21,002.92-28,983.66-11,571.40

Finding the Fourth Proportional to 21,002.92, 28,983.66 and 11,571.40

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Solution

The fourth proportional to 21,002.92, 28,983.66 and 11,571.40 is: 15,968.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.92 : 28,983.66 = 11,571.40 : x
  2. Step 2: Convert to fraction form
    21,002.92/28,983.66 = 11,571.40/x
  3. Step 3: Cross multiply
    21,002.92x = 28,983.66 × 11,571.40
  4. Step 4: Simplify right side
    21,002.92x = 335,381,523.32
  5. Step 5: Solve for x
    x = 335,381,523.32/21,002.92
  6. Step 6: Final answer
    x = 15,968.33

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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.