Home / 3,905.63-5,389.56-2,136.89

Finding the Fourth Proportional to 3,905.63, 5,389.56 and 2,136.89

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Solution

The fourth proportional to 3,905.63, 5,389.56 and 2,136.89 is: 2,948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.63 : 5,389.56 = 2,136.89 : x
  2. Step 2: Convert to fraction form
    3,905.63/5,389.56 = 2,136.89/x
  3. Step 3: Cross multiply
    3,905.63x = 5,389.56 × 2,136.89
  4. Step 4: Simplify right side
    3,905.63x = 11,516,923.93
  5. Step 5: Solve for x
    x = 11,516,923.93/3,905.63
  6. Step 6: Final answer
    x = 2,948.80

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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.