Home / 13,136.80-19,712.40-5,351.20

Finding the Fourth Proportional to 13,136.80, 19,712.40 and 5,351.20

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Solution

The fourth proportional to 13,136.80, 19,712.40 and 5,351.20 is: 8,029.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,136.80 : 19,712.40 = 5,351.20 : x
  2. Step 2: Convert to fraction form
    13,136.80/19,712.40 = 5,351.20/x
  3. Step 3: Cross multiply
    13,136.80x = 19,712.40 × 5,351.20
  4. Step 4: Simplify right side
    13,136.80x = 105,484,994.88
  5. Step 5: Solve for x
    x = 105,484,994.88/13,136.80
  6. Step 6: Final answer
    x = 8,029.73

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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.