Home / 21,001.62-28,981.89-11,571.06

Finding the Fourth Proportional to 21,001.62, 28,981.89 and 11,571.06

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Solution

The fourth proportional to 21,001.62, 28,981.89 and 11,571.06 is: 15,967.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,001.62 : 28,981.89 = 11,571.06 : x
  2. Step 2: Convert to fraction form
    21,001.62/28,981.89 = 11,571.06/x
  3. Step 3: Cross multiply
    21,001.62x = 28,981.89 × 11,571.06
  4. Step 4: Simplify right side
    21,001.62x = 335,351,188.10
  5. Step 5: Solve for x
    x = 335,351,188.10/21,001.62
  6. Step 6: Final answer
    x = 15,967.87

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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.