Home / 13,759.12-18,983.73-7,790.66

Finding the Fourth Proportional to 13,759.12, 18,983.73 and 7,790.66

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Solution

The fourth proportional to 13,759.12, 18,983.73 and 7,790.66 is: 10,748.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.12 : 18,983.73 = 7,790.66 : x
  2. Step 2: Convert to fraction form
    13,759.12/18,983.73 = 7,790.66/x
  3. Step 3: Cross multiply
    13,759.12x = 18,983.73 × 7,790.66
  4. Step 4: Simplify right side
    13,759.12x = 147,895,785.96
  5. Step 5: Solve for x
    x = 147,895,785.96/13,759.12
  6. Step 6: Final answer
    x = 10,748.93

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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.