Home / 21,208.72-29,268.20-11,777.36

Finding the Fourth Proportional to 21,208.72, 29,268.20 and 11,777.36

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Solution

The fourth proportional to 21,208.72, 29,268.20 and 11,777.36 is: 16,252.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,208.72 : 29,268.20 = 11,777.36 : x
  2. Step 2: Convert to fraction form
    21,208.72/29,268.20 = 11,777.36/x
  3. Step 3: Cross multiply
    21,208.72x = 29,268.20 × 11,777.36
  4. Step 4: Simplify right side
    21,208.72x = 344,702,127.95
  5. Step 5: Solve for x
    x = 344,702,127.95/21,208.72
  6. Step 6: Final answer
    x = 16,252.85

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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.