Home / 21,118.24-29,143.56-11,687.68

Finding the Fourth Proportional to 21,118.24, 29,143.56 and 11,687.68

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Solution

The fourth proportional to 21,118.24, 29,143.56 and 11,687.68 is: 16,129.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,118.24 : 29,143.56 = 11,687.68 : x
  2. Step 2: Convert to fraction form
    21,118.24/29,143.56 = 11,687.68/x
  3. Step 3: Cross multiply
    21,118.24x = 29,143.56 × 11,687.68
  4. Step 4: Simplify right side
    21,118.24x = 340,620,603.34
  5. Step 5: Solve for x
    x = 340,620,603.34/21,118.24
  6. Step 6: Final answer
    x = 16,129.21

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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.