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Finding the Fourth Proportional to 21,604.57, 29,805.02 and 13,103.44

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Solution

The fourth proportional to 21,604.57, 29,805.02 and 13,103.44 is: 18,077.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,604.57 : 29,805.02 = 13,103.44 : x
  2. Step 2: Convert to fraction form
    21,604.57/29,805.02 = 13,103.44/x
  3. Step 3: Cross multiply
    21,604.57x = 29,805.02 × 13,103.44
  4. Step 4: Simplify right side
    21,604.57x = 390,548,291.27
  5. Step 5: Solve for x
    x = 390,548,291.27/21,604.57
  6. Step 6: Final answer
    x = 18,077.12

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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.