Home / 21,119.16-29,145.36-11,687.73

Finding the Fourth Proportional to 21,119.16, 29,145.36 and 11,687.73

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Solution

The fourth proportional to 21,119.16, 29,145.36 and 11,687.73 is: 16,129.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.16 : 29,145.36 = 11,687.73 : x
  2. Step 2: Convert to fraction form
    21,119.16/29,145.36 = 11,687.73/x
  3. Step 3: Cross multiply
    21,119.16x = 29,145.36 × 11,687.73
  4. Step 4: Simplify right side
    21,119.16x = 340,642,894.27
  5. Step 5: Solve for x
    x = 340,642,894.27/21,119.16
  6. Step 6: Final answer
    x = 16,129.57

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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.