Home / 21,419.91-29,558.51-11,859.12

Finding the Fourth Proportional to 21,419.91, 29,558.51 and 11,859.12

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Solution

The fourth proportional to 21,419.91, 29,558.51 and 11,859.12 is: 16,365.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,419.91 : 29,558.51 = 11,859.12 : x
  2. Step 2: Convert to fraction form
    21,419.91/29,558.51 = 11,859.12/x
  3. Step 3: Cross multiply
    21,419.91x = 29,558.51 × 11,859.12
  4. Step 4: Simplify right side
    21,419.91x = 350,538,013.13
  5. Step 5: Solve for x
    x = 350,538,013.13/21,419.91
  6. Step 6: Final answer
    x = 16,365.05

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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.