Home / 13,729.33-18,946.20-7,760.85

Finding the Fourth Proportional to 13,729.33, 18,946.20 and 7,760.85

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Solution

The fourth proportional to 13,729.33, 18,946.20 and 7,760.85 is: 10,709.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.33 : 18,946.20 = 7,760.85 : x
  2. Step 2: Convert to fraction form
    13,729.33/18,946.20 = 7,760.85/x
  3. Step 3: Cross multiply
    13,729.33x = 18,946.20 × 7,760.85
  4. Step 4: Simplify right side
    13,729.33x = 147,038,616.27
  5. Step 5: Solve for x
    x = 147,038,616.27/13,729.33
  6. Step 6: Final answer
    x = 10,709.82

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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.