Home / 13,729.04-18,944.96-7,761.28

Finding the Fourth Proportional to 13,729.04, 18,944.96 and 7,761.28

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Solution

The fourth proportional to 13,729.04, 18,944.96 and 7,761.28 is: 10,709.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,729.04 : 18,944.96 = 7,761.28 : x
  2. Step 2: Convert to fraction form
    13,729.04/18,944.96 = 7,761.28/x
  3. Step 3: Cross multiply
    13,729.04x = 18,944.96 × 7,761.28
  4. Step 4: Simplify right side
    13,729.04x = 147,037,139.15
  5. Step 5: Solve for x
    x = 147,037,139.15/13,729.04
  6. Step 6: Final answer
    x = 10,709.94

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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.