Home / 21,198.16-29,252.08-13,239.92

Finding the Fourth Proportional to 21,198.16, 29,252.08 and 13,239.92

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Solution

The fourth proportional to 21,198.16, 29,252.08 and 13,239.92 is: 18,270.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.16 : 29,252.08 = 13,239.92 : x
  2. Step 2: Convert to fraction form
    21,198.16/29,252.08 = 13,239.92/x
  3. Step 3: Cross multiply
    21,198.16x = 29,252.08 × 13,239.92
  4. Step 4: Simplify right side
    21,198.16x = 387,295,199.03
  5. Step 5: Solve for x
    x = 387,295,199.03/21,198.16
  6. Step 6: Final answer
    x = 18,270.23

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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.