Home / 12,786.02-19,175.79-5,390.42

Finding the Fourth Proportional to 12,786.02, 19,175.79 and 5,390.42

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Solution

The fourth proportional to 12,786.02, 19,175.79 and 5,390.42 is: 8,084.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.02 : 19,175.79 = 5,390.42 : x
  2. Step 2: Convert to fraction form
    12,786.02/19,175.79 = 5,390.42/x
  3. Step 3: Cross multiply
    12,786.02x = 19,175.79 × 5,390.42
  4. Step 4: Simplify right side
    12,786.02x = 103,365,561.93
  5. Step 5: Solve for x
    x = 103,365,561.93/12,786.02
  6. Step 6: Final answer
    x = 8,084.26

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1.5x scale

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.