Home / 21,261.73-29,338.09-12,762.05

Finding the Fourth Proportional to 21,261.73, 29,338.09 and 12,762.05

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Solution

The fourth proportional to 21,261.73, 29,338.09 and 12,762.05 is: 17,609.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,261.73 : 29,338.09 = 12,762.05 : x
  2. Step 2: Convert to fraction form
    21,261.73/29,338.09 = 12,762.05/x
  3. Step 3: Cross multiply
    21,261.73x = 29,338.09 × 12,762.05
  4. Step 4: Simplify right side
    21,261.73x = 374,414,171.48
  5. Step 5: Solve for x
    x = 374,414,171.48/21,261.73
  6. Step 6: Final answer
    x = 17,609.77

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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.