Home / 21,420.12-29,559.46-11,859.09

Finding the Fourth Proportional to 21,420.12, 29,559.46 and 11,859.09

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Solution

The fourth proportional to 21,420.12, 29,559.46 and 11,859.09 is: 16,365.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.12 : 29,559.46 = 11,859.09 : x
  2. Step 2: Convert to fraction form
    21,420.12/29,559.46 = 11,859.09/x
  3. Step 3: Cross multiply
    21,420.12x = 29,559.46 × 11,859.09
  4. Step 4: Simplify right side
    21,420.12x = 350,548,296.49
  5. Step 5: Solve for x
    x = 350,548,296.49/21,420.12
  6. Step 6: Final answer
    x = 16,365.38

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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.