Home / 12,768.47-19,148.45-5,371.55

Finding the Fourth Proportional to 12,768.47, 19,148.45 and 5,371.55

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Solution

The fourth proportional to 12,768.47, 19,148.45 and 5,371.55 is: 8,055.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,768.47 : 19,148.45 = 5,371.55 : x
  2. Step 2: Convert to fraction form
    12,768.47/19,148.45 = 5,371.55/x
  3. Step 3: Cross multiply
    12,768.47x = 19,148.45 × 5,371.55
  4. Step 4: Simplify right side
    12,768.47x = 102,856,734.00
  5. Step 5: Solve for x
    x = 102,856,734.00/12,768.47
  6. Step 6: Final answer
    x = 8,055.53

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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.