Home / 21,203.82-29,267.28-13,139.64

Finding the Fourth Proportional to 21,203.82, 29,267.28 and 13,139.64

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Solution

The fourth proportional to 21,203.82, 29,267.28 and 13,139.64 is: 18,136.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.82 : 29,267.28 = 13,139.64 : x
  2. Step 2: Convert to fraction form
    21,203.82/29,267.28 = 13,139.64/x
  3. Step 3: Cross multiply
    21,203.82x = 29,267.28 × 13,139.64
  4. Step 4: Simplify right side
    21,203.82x = 384,561,522.98
  5. Step 5: Solve for x
    x = 384,561,522.98/21,203.82
  6. Step 6: Final answer
    x = 18,136.43

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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.