Home / 21,297.25-29,390.21-11,865.61

Finding the Fourth Proportional to 21,297.25, 29,390.21 and 11,865.61

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Solution

The fourth proportional to 21,297.25, 29,390.21 and 11,865.61 is: 16,374.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,297.25 : 29,390.21 = 11,865.61 : x
  2. Step 2: Convert to fraction form
    21,297.25/29,390.21 = 11,865.61/x
  3. Step 3: Cross multiply
    21,297.25x = 29,390.21 × 11,865.61
  4. Step 4: Simplify right side
    21,297.25x = 348,732,769.68
  5. Step 5: Solve for x
    x = 348,732,769.68/21,297.25
  6. Step 6: Final answer
    x = 16,374.54

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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.