Home / 12,750.78-19,118.34-4,427.22

Finding the Fourth Proportional to 12,750.78, 19,118.34 and 4,427.22

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Solution

The fourth proportional to 12,750.78, 19,118.34 and 4,427.22 is: 6,638.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.78 : 19,118.34 = 4,427.22 : x
  2. Step 2: Convert to fraction form
    12,750.78/19,118.34 = 4,427.22/x
  3. Step 3: Cross multiply
    12,750.78x = 19,118.34 × 4,427.22
  4. Step 4: Simplify right side
    12,750.78x = 84,641,097.21
  5. Step 5: Solve for x
    x = 84,641,097.21/12,750.78
  6. Step 6: Final answer
    x = 6,638.11

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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.