Home / 12,750.25-19,128.07-3,985.82

Finding the Fourth Proportional to 12,750.25, 19,128.07 and 3,985.82

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Solution

The fourth proportional to 12,750.25, 19,128.07 and 3,985.82 is: 5,979.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.25 : 19,128.07 = 3,985.82 : x
  2. Step 2: Convert to fraction form
    12,750.25/19,128.07 = 3,985.82/x
  3. Step 3: Cross multiply
    12,750.25x = 19,128.07 × 3,985.82
  4. Step 4: Simplify right side
    12,750.25x = 76,241,034.00
  5. Step 5: Solve for x
    x = 76,241,034.00/12,750.25
  6. Step 6: Final answer
    x = 5,979.57

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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.