Home / 21,078.43-29,101.80-13,528.02

Finding the Fourth Proportional to 21,078.43, 29,101.80 and 13,528.02

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Solution

The fourth proportional to 21,078.43, 29,101.80 and 13,528.02 is: 18,677.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.43 : 29,101.80 = 13,528.02 : x
  2. Step 2: Convert to fraction form
    21,078.43/29,101.80 = 13,528.02/x
  3. Step 3: Cross multiply
    21,078.43x = 29,101.80 × 13,528.02
  4. Step 4: Simplify right side
    21,078.43x = 393,689,732.44
  5. Step 5: Solve for x
    x = 393,689,732.44/21,078.43
  6. Step 6: Final answer
    x = 18,677.37

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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.