Home / 21,003.49-28,984.90-11,572.05

Finding the Fourth Proportional to 21,003.49, 28,984.90 and 11,572.05

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Solution

The fourth proportional to 21,003.49, 28,984.90 and 11,572.05 is: 15,969.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.49 : 28,984.90 = 11,572.05 : x
  2. Step 2: Convert to fraction form
    21,003.49/28,984.90 = 11,572.05/x
  3. Step 3: Cross multiply
    21,003.49x = 28,984.90 × 11,572.05
  4. Step 4: Simplify right side
    21,003.49x = 335,414,712.05
  5. Step 5: Solve for x
    x = 335,414,712.05/21,003.49
  6. Step 6: Final answer
    x = 15,969.48

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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.