Home / 21,281.22-29,374.11-12,786.04

Finding the Fourth Proportional to 21,281.22, 29,374.11 and 12,786.04

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Solution

The fourth proportional to 21,281.22, 29,374.11 and 12,786.04 is: 17,648.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,281.22 : 29,374.11 = 12,786.04 : x
  2. Step 2: Convert to fraction form
    21,281.22/29,374.11 = 12,786.04/x
  3. Step 3: Cross multiply
    21,281.22x = 29,374.11 × 12,786.04
  4. Step 4: Simplify right side
    21,281.22x = 375,578,545.42
  5. Step 5: Solve for x
    x = 375,578,545.42/21,281.22
  6. Step 6: Final answer
    x = 17,648.36

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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.