Home / 21,612.97-29,826.21-12,181.51

Finding the Fourth Proportional to 21,612.97, 29,826.21 and 12,181.51

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Solution

The fourth proportional to 21,612.97, 29,826.21 and 12,181.51 is: 16,810.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.97 : 29,826.21 = 12,181.51 : x
  2. Step 2: Convert to fraction form
    21,612.97/29,826.21 = 12,181.51/x
  3. Step 3: Cross multiply
    21,612.97x = 29,826.21 × 12,181.51
  4. Step 4: Simplify right side
    21,612.97x = 363,328,275.38
  5. Step 5: Solve for x
    x = 363,328,275.38/21,612.97
  6. Step 6: Final answer
    x = 16,810.66

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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.