Home / 21,171.08-29,216.72-12,218.96

Finding the Fourth Proportional to 21,171.08, 29,216.72 and 12,218.96

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Solution

The fourth proportional to 21,171.08, 29,216.72 and 12,218.96 is: 16,862.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.08 : 29,216.72 = 12,218.96 : x
  2. Step 2: Convert to fraction form
    21,171.08/29,216.72 = 12,218.96/x
  3. Step 3: Cross multiply
    21,171.08x = 29,216.72 × 12,218.96
  4. Step 4: Simplify right side
    21,171.08x = 356,997,933.01
  5. Step 5: Solve for x
    x = 356,997,933.01/21,171.08
  6. Step 6: Final answer
    x = 16,862.53

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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.