Home / 21,342.39-29,451.30-11,911.56

Finding the Fourth Proportional to 21,342.39, 29,451.30 and 11,911.56

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Solution

The fourth proportional to 21,342.39, 29,451.30 and 11,911.56 is: 16,437.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,342.39 : 29,451.30 = 11,911.56 : x
  2. Step 2: Convert to fraction form
    21,342.39/29,451.30 = 11,911.56/x
  3. Step 3: Cross multiply
    21,342.39x = 29,451.30 × 11,911.56
  4. Step 4: Simplify right side
    21,342.39x = 350,810,927.03
  5. Step 5: Solve for x
    x = 350,810,927.03/21,342.39
  6. Step 6: Final answer
    x = 16,437.28

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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.