Home / 13,760.42-18,989.24-7,790.72

Finding the Fourth Proportional to 13,760.42, 18,989.24 and 7,790.72

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Solution

The fourth proportional to 13,760.42, 18,989.24 and 7,790.72 is: 10,751.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,760.42 : 18,989.24 = 7,790.72 : x
  2. Step 2: Convert to fraction form
    13,760.42/18,989.24 = 7,790.72/x
  3. Step 3: Cross multiply
    13,760.42x = 18,989.24 × 7,790.72
  4. Step 4: Simplify right side
    13,760.42x = 147,939,717.95
  5. Step 5: Solve for x
    x = 147,939,717.95/13,760.42
  6. Step 6: Final answer
    x = 10,751.11

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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.