Home / 13,729.26-18,946.90-7,761.59

Finding the Fourth Proportional to 13,729.26, 18,946.90 and 7,761.59

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Solution

The fourth proportional to 13,729.26, 18,946.90 and 7,761.59 is: 10,711.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.26 : 18,946.90 = 7,761.59 : x
  2. Step 2: Convert to fraction form
    13,729.26/18,946.90 = 7,761.59/x
  3. Step 3: Cross multiply
    13,729.26x = 18,946.90 × 7,761.59
  4. Step 4: Simplify right side
    13,729.26x = 147,057,936.03
  5. Step 5: Solve for x
    x = 147,057,936.03/13,729.26
  6. Step 6: Final answer
    x = 10,711.28

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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.