Home / 12,750.45-19,125.69-3,985.41

Finding the Fourth Proportional to 12,750.45, 19,125.69 and 3,985.41

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Solution

The fourth proportional to 12,750.45, 19,125.69 and 3,985.41 is: 5,978.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.45 : 19,125.69 = 3,985.41 : x
  2. Step 2: Convert to fraction form
    12,750.45/19,125.69 = 3,985.41/x
  3. Step 3: Cross multiply
    12,750.45x = 19,125.69 × 3,985.41
  4. Step 4: Simplify right side
    12,750.45x = 76,223,716.18
  5. Step 5: Solve for x
    x = 76,223,716.18/12,750.45
  6. Step 6: Final answer
    x = 5,978.12

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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.