Home / 21,653.17-29,879.22-12,219.91

Finding the Fourth Proportional to 21,653.17, 29,879.22 and 12,219.91

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Solution

The fourth proportional to 21,653.17, 29,879.22 and 12,219.91 is: 16,862.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.17 : 29,879.22 = 12,219.91 : x
  2. Step 2: Convert to fraction form
    21,653.17/29,879.22 = 12,219.91/x
  3. Step 3: Cross multiply
    21,653.17x = 29,879.22 × 12,219.91
  4. Step 4: Simplify right side
    21,653.17x = 365,121,379.27
  5. Step 5: Solve for x
    x = 365,121,379.27/21,653.17
  6. Step 6: Final answer
    x = 16,862.26

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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.