Home / 13,953.89-20,930.94-5,188.79

Finding the Fourth Proportional to 13,953.89, 20,930.94 and 5,188.79

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Solution

The fourth proportional to 13,953.89, 20,930.94 and 5,188.79 is: 7,783.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.89 : 20,930.94 = 5,188.79 : x
  2. Step 2: Convert to fraction form
    13,953.89/20,930.94 = 5,188.79/x
  3. Step 3: Cross multiply
    13,953.89x = 20,930.94 × 5,188.79
  4. Step 4: Simplify right side
    13,953.89x = 108,606,304.49
  5. Step 5: Solve for x
    x = 108,606,304.49/13,953.89
  6. Step 6: Final answer
    x = 7,783.23

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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.