Home / 12,991.78-19,484.43-5,095.90

Finding the Fourth Proportional to 12,991.78, 19,484.43 and 5,095.90

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Solution

The fourth proportional to 12,991.78, 19,484.43 and 5,095.90 is: 7,642.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.78 : 19,484.43 = 5,095.90 : x
  2. Step 2: Convert to fraction form
    12,991.78/19,484.43 = 5,095.90/x
  3. Step 3: Cross multiply
    12,991.78x = 19,484.43 × 5,095.90
  4. Step 4: Simplify right side
    12,991.78x = 99,290,706.84
  5. Step 5: Solve for x
    x = 99,290,706.84/12,991.78
  6. Step 6: Final answer
    x = 7,642.58

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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.