Home / 13,759.20-18,986.65-7,789.68

Finding the Fourth Proportional to 13,759.20, 18,986.65 and 7,789.68

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Solution

The fourth proportional to 13,759.20, 18,986.65 and 7,789.68 is: 10,749.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.20 : 18,986.65 = 7,789.68 : x
  2. Step 2: Convert to fraction form
    13,759.20/18,986.65 = 7,789.68/x
  3. Step 3: Cross multiply
    13,759.20x = 18,986.65 × 7,789.68
  4. Step 4: Simplify right side
    13,759.20x = 147,899,908.30
  5. Step 5: Solve for x
    x = 147,899,908.30/13,759.20
  6. Step 6: Final answer
    x = 10,749.16

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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.