Home / 21,291.60-29,383.08-11,730.96

Finding the Fourth Proportional to 21,291.60, 29,383.08 and 11,730.96

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Solution

The fourth proportional to 21,291.60, 29,383.08 and 11,730.96 is: 16,189.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.60 : 29,383.08 = 11,730.96 : x
  2. Step 2: Convert to fraction form
    21,291.60/29,383.08 = 11,730.96/x
  3. Step 3: Cross multiply
    21,291.60x = 29,383.08 × 11,730.96
  4. Step 4: Simplify right side
    21,291.60x = 344,691,736.16
  5. Step 5: Solve for x
    x = 344,691,736.16/21,291.60
  6. Step 6: Final answer
    x = 16,189.10

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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.