Home / 21,175.10-29,225.31-12,221.09

Finding the Fourth Proportional to 21,175.10, 29,225.31 and 12,221.09

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Solution

The fourth proportional to 21,175.10, 29,225.31 and 12,221.09 is: 16,867.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.10 : 29,225.31 = 12,221.09 : x
  2. Step 2: Convert to fraction form
    21,175.10/29,225.31 = 12,221.09/x
  3. Step 3: Cross multiply
    21,175.10x = 29,225.31 × 12,221.09
  4. Step 4: Simplify right side
    21,175.10x = 357,165,143.79
  5. Step 5: Solve for x
    x = 357,165,143.79/21,175.10
  6. Step 6: Final answer
    x = 16,867.22

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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.