Home / 21,090.60-29,105.10-11,530.62

Finding the Fourth Proportional to 21,090.60, 29,105.10 and 11,530.62

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Solution

The fourth proportional to 21,090.60, 29,105.10 and 11,530.62 is: 15,912.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,090.60 : 29,105.10 = 11,530.62 : x
  2. Step 2: Convert to fraction form
    21,090.60/29,105.10 = 11,530.62/x
  3. Step 3: Cross multiply
    21,090.60x = 29,105.10 × 11,530.62
  4. Step 4: Simplify right side
    21,090.60x = 335,599,848.16
  5. Step 5: Solve for x
    x = 335,599,848.16/21,090.60
  6. Step 6: Final answer
    x = 15,912.29

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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.