Home / 21,111.14-29,133-11,679.70

Finding the Fourth Proportional to 21,111.14, 29,133 and 11,679.70

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Solution

The fourth proportional to 21,111.14, 29,133 and 11,679.70 is: 16,117.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,111.14 : 29,133 = 11,679.70 : x
  2. Step 2: Convert to fraction form
    21,111.14/29,133 = 11,679.70/x
  3. Step 3: Cross multiply
    21,111.14x = 29,133 × 11,679.70
  4. Step 4: Simplify right side
    21,111.14x = 340,264,700.10
  5. Step 5: Solve for x
    x = 340,264,700.10/21,111.14
  6. Step 6: Final answer
    x = 16,117.78

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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.