Home / 21,012.27-28,997.07-11,580.83

Finding the Fourth Proportional to 21,012.27, 28,997.07 and 11,580.83

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Solution

The fourth proportional to 21,012.27, 28,997.07 and 11,580.83 is: 15,981.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.27 : 28,997.07 = 11,580.83 : x
  2. Step 2: Convert to fraction form
    21,012.27/28,997.07 = 11,580.83/x
  3. Step 3: Cross multiply
    21,012.27x = 28,997.07 × 11,580.83
  4. Step 4: Simplify right side
    21,012.27x = 335,810,167.23
  5. Step 5: Solve for x
    x = 335,810,167.23/21,012.27
  6. Step 6: Final answer
    x = 15,981.62

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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.