Home / 21,012.43-28,997.14-11,580.99

Finding the Fourth Proportional to 21,012.43, 28,997.14 and 11,580.99

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Solution

The fourth proportional to 21,012.43, 28,997.14 and 11,580.99 is: 15,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.43 : 28,997.14 = 11,580.99 : x
  2. Step 2: Convert to fraction form
    21,012.43/28,997.14 = 11,580.99/x
  3. Step 3: Cross multiply
    21,012.43x = 28,997.14 × 11,580.99
  4. Step 4: Simplify right side
    21,012.43x = 335,815,588.37
  5. Step 5: Solve for x
    x = 335,815,588.37/21,012.43
  6. Step 6: Final answer
    x = 15,981.76

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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.