Home / 21,431.82-29,574.26-11,999.10

Finding the Fourth Proportional to 21,431.82, 29,574.26 and 11,999.10

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Solution

The fourth proportional to 21,431.82, 29,574.26 and 11,999.10 is: 16,557.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.82 : 29,574.26 = 11,999.10 : x
  2. Step 2: Convert to fraction form
    21,431.82/29,574.26 = 11,999.10/x
  3. Step 3: Cross multiply
    21,431.82x = 29,574.26 × 11,999.10
  4. Step 4: Simplify right side
    21,431.82x = 354,864,503.17
  5. Step 5: Solve for x
    x = 354,864,503.17/21,431.82
  6. Step 6: Final answer
    x = 16,557.83

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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.