Home / 13,761.36-18,989.64-7,791.66

Finding the Fourth Proportional to 13,761.36, 18,989.64 and 7,791.66

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Solution

The fourth proportional to 13,761.36, 18,989.64 and 7,791.66 is: 10,751.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.36 : 18,989.64 = 7,791.66 : x
  2. Step 2: Convert to fraction form
    13,761.36/18,989.64 = 7,791.66/x
  3. Step 3: Cross multiply
    13,761.36x = 18,989.64 × 7,791.66
  4. Step 4: Simplify right side
    13,761.36x = 147,960,818.40
  5. Step 5: Solve for x
    x = 147,960,818.40/13,761.36
  6. Step 6: Final answer
    x = 10,751.90

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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.