Home / 21,538.99-29,723.64-11,978.96

Finding the Fourth Proportional to 21,538.99, 29,723.64 and 11,978.96

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Solution

The fourth proportional to 21,538.99, 29,723.64 and 11,978.96 is: 16,530.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,538.99 : 29,723.64 = 11,978.96 : x
  2. Step 2: Convert to fraction form
    21,538.99/29,723.64 = 11,978.96/x
  3. Step 3: Cross multiply
    21,538.99x = 29,723.64 × 11,978.96
  4. Step 4: Simplify right side
    21,538.99x = 356,058,294.61
  5. Step 5: Solve for x
    x = 356,058,294.61/21,538.99
  6. Step 6: Final answer
    x = 16,530.88

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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.