Home / 21,183.78-29,209.53-13,516.74

Finding the Fourth Proportional to 21,183.78, 29,209.53 and 13,516.74

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Solution

The fourth proportional to 21,183.78, 29,209.53 and 13,516.74 is: 18,637.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.78 : 29,209.53 = 13,516.74 : x
  2. Step 2: Convert to fraction form
    21,183.78/29,209.53 = 13,516.74/x
  3. Step 3: Cross multiply
    21,183.78x = 29,209.53 × 13,516.74
  4. Step 4: Simplify right side
    21,183.78x = 394,817,622.53
  5. Step 5: Solve for x
    x = 394,817,622.53/21,183.78
  6. Step 6: Final answer
    x = 18,637.73

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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.