Home / 39,900.78-55,063.06-21,751.54

Finding the Fourth Proportional to 39,900.78, 55,063.06 and 21,751.54

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Solution

The fourth proportional to 39,900.78, 55,063.06 and 21,751.54 is: 30,017.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,900.78 : 55,063.06 = 21,751.54 : x
  2. Step 2: Convert to fraction form
    39,900.78/55,063.06 = 21,751.54/x
  3. Step 3: Cross multiply
    39,900.78x = 55,063.06 × 21,751.54
  4. Step 4: Simplify right side
    39,900.78x = 1,197,706,352.11
  5. Step 5: Solve for x
    x = 1,197,706,352.11/39,900.78
  6. Step 6: Final answer
    x = 30,017.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.