Home / 21,012.75-28,997.60-11,581.92

Finding the Fourth Proportional to 21,012.75, 28,997.60 and 11,581.92

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Solution

The fourth proportional to 21,012.75, 28,997.60 and 11,581.92 is: 15,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.75 : 28,997.60 = 11,581.92 : x
  2. Step 2: Convert to fraction form
    21,012.75/28,997.60 = 11,581.92/x
  3. Step 3: Cross multiply
    21,012.75x = 28,997.60 × 11,581.92
  4. Step 4: Simplify right side
    21,012.75x = 335,847,825.48
  5. Step 5: Solve for x
    x = 335,847,825.48/21,012.75
  6. Step 6: Final answer
    x = 15,983.05

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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.