Home / 21,013.19-28,997.82-11,453.16

Finding the Fourth Proportional to 21,013.19, 28,997.82 and 11,453.16

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Solution

The fourth proportional to 21,013.19, 28,997.82 and 11,453.16 is: 15,805.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.19 : 28,997.82 = 11,453.16 : x
  2. Step 2: Convert to fraction form
    21,013.19/28,997.82 = 11,453.16/x
  3. Step 3: Cross multiply
    21,013.19x = 28,997.82 × 11,453.16
  4. Step 4: Simplify right side
    21,013.19x = 332,116,672.11
  5. Step 5: Solve for x
    x = 332,116,672.11/21,013.19
  6. Step 6: Final answer
    x = 15,805.15

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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.