Home / 21,216.30-29,279.03-11,656.42

Finding the Fourth Proportional to 21,216.30, 29,279.03 and 11,656.42

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Solution

The fourth proportional to 21,216.30, 29,279.03 and 11,656.42 is: 16,086.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.30 : 29,279.03 = 11,656.42 : x
  2. Step 2: Convert to fraction form
    21,216.30/29,279.03 = 11,656.42/x
  3. Step 3: Cross multiply
    21,216.30x = 29,279.03 × 11,656.42
  4. Step 4: Simplify right side
    21,216.30x = 341,288,822.10
  5. Step 5: Solve for x
    x = 341,288,822.10/21,216.30
  6. Step 6: Final answer
    x = 16,086.16

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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.