Home / 21,380.12-29,504.60-11,948.68

Finding the Fourth Proportional to 21,380.12, 29,504.60 and 11,948.68

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Solution

The fourth proportional to 21,380.12, 29,504.60 and 11,948.68 is: 16,489.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.12 : 29,504.60 = 11,948.68 : x
  2. Step 2: Convert to fraction form
    21,380.12/29,504.60 = 11,948.68/x
  3. Step 3: Cross multiply
    21,380.12x = 29,504.60 × 11,948.68
  4. Step 4: Simplify right side
    21,380.12x = 352,540,980.04
  5. Step 5: Solve for x
    x = 352,540,980.04/21,380.12
  6. Step 6: Final answer
    x = 16,489.20

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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.