Home / 21,012.54-28,997.40-11,581.74

Finding the Fourth Proportional to 21,012.54, 28,997.40 and 11,581.74

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Solution

The fourth proportional to 21,012.54, 28,997.40 and 11,581.74 is: 15,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.54 : 28,997.40 = 11,581.74 : x
  2. Step 2: Convert to fraction form
    21,012.54/28,997.40 = 11,581.74/x
  3. Step 3: Cross multiply
    21,012.54x = 28,997.40 × 11,581.74
  4. Step 4: Simplify right side
    21,012.54x = 335,840,347.48
  5. Step 5: Solve for x
    x = 335,840,347.48/21,012.54
  6. Step 6: Final answer
    x = 15,982.85

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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.