Home / 13,630.94-18,811.80-7,890.33

Finding the Fourth Proportional to 13,630.94, 18,811.80 and 7,890.33

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Solution

The fourth proportional to 13,630.94, 18,811.80 and 7,890.33 is: 10,889.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.94 : 18,811.80 = 7,890.33 : x
  2. Step 2: Convert to fraction form
    13,630.94/18,811.80 = 7,890.33/x
  3. Step 3: Cross multiply
    13,630.94x = 18,811.80 × 7,890.33
  4. Step 4: Simplify right side
    13,630.94x = 148,431,309.89
  5. Step 5: Solve for x
    x = 148,431,309.89/13,630.94
  6. Step 6: Final answer
    x = 10,889.29

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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.