Home / 21,002.57-28,981.83-11,571.13

Finding the Fourth Proportional to 21,002.57, 28,981.83 and 11,571.13

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Solution

The fourth proportional to 21,002.57, 28,981.83 and 11,571.13 is: 15,967.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002.57 : 28,981.83 = 11,571.13 : x
  2. Step 2: Convert to fraction form
    21,002.57/28,981.83 = 11,571.13/x
  3. Step 3: Cross multiply
    21,002.57x = 28,981.83 × 11,571.13
  4. Step 4: Simplify right side
    21,002.57x = 335,352,522.57
  5. Step 5: Solve for x
    x = 335,352,522.57/21,002.57
  6. Step 6: Final answer
    x = 15,967.21

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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.