Home / 13,901.72-20,855.30-5,136.71

Finding the Fourth Proportional to 13,901.72, 20,855.30 and 5,136.71

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Solution

The fourth proportional to 13,901.72, 20,855.30 and 5,136.71 is: 7,706.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,901.72 : 20,855.30 = 5,136.71 : x
  2. Step 2: Convert to fraction form
    13,901.72/20,855.30 = 5,136.71/x
  3. Step 3: Cross multiply
    13,901.72x = 20,855.30 × 5,136.71
  4. Step 4: Simplify right side
    13,901.72x = 107,127,498.10
  5. Step 5: Solve for x
    x = 107,127,498.10/13,901.72
  6. Step 6: Final answer
    x = 7,706.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.