Home / 13,930.88-19,223.88-7,961.76

Finding the Fourth Proportional to 13,930.88, 19,223.88 and 7,961.76

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Solution

The fourth proportional to 13,930.88, 19,223.88 and 7,961.76 is: 10,986.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,930.88 : 19,223.88 = 7,961.76 : x
  2. Step 2: Convert to fraction form
    13,930.88/19,223.88 = 7,961.76/x
  3. Step 3: Cross multiply
    13,930.88x = 19,223.88 × 7,961.76
  4. Step 4: Simplify right side
    13,930.88x = 153,055,918.83
  5. Step 5: Solve for x
    x = 153,055,918.83/13,930.88
  6. Step 6: Final answer
    x = 10,986.81

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1.5x scale

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.