Home / 21,652.15-29,879.97-12,220.72

Finding the Fourth Proportional to 21,652.15, 29,879.97 and 12,220.72

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Solution

The fourth proportional to 21,652.15, 29,879.97 and 12,220.72 is: 16,864.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,652.15 : 29,879.97 = 12,220.72 : x
  2. Step 2: Convert to fraction form
    21,652.15/29,879.97 = 12,220.72/x
  3. Step 3: Cross multiply
    21,652.15x = 29,879.97 × 12,220.72
  4. Step 4: Simplify right side
    21,652.15x = 365,154,687.07
  5. Step 5: Solve for x
    x = 365,154,687.07/21,652.15
  6. Step 6: Final answer
    x = 16,864.59

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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.