Home / 13,187.78-19,781.44-5,292.31

Finding the Fourth Proportional to 13,187.78, 19,781.44 and 5,292.31

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Solution

The fourth proportional to 13,187.78, 19,781.44 and 5,292.31 is: 7,938.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.78 : 19,781.44 = 5,292.31 : x
  2. Step 2: Convert to fraction form
    13,187.78/19,781.44 = 5,292.31/x
  3. Step 3: Cross multiply
    13,187.78x = 19,781.44 × 5,292.31
  4. Step 4: Simplify right side
    13,187.78x = 104,689,450.04
  5. Step 5: Solve for x
    x = 104,689,450.04/13,187.78
  6. Step 6: Final answer
    x = 7,938.37

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1.5x scale

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.