Home / 13,757.81-18,986.00-7,789.32

Finding the Fourth Proportional to 13,757.81, 18,986.00 and 7,789.32

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Solution

The fourth proportional to 13,757.81, 18,986.00 and 7,789.32 is: 10,749.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.81 : 18,986.00 = 7,789.32 : x
  2. Step 2: Convert to fraction form
    13,757.81/18,986.00 = 7,789.32/x
  3. Step 3: Cross multiply
    13,757.81x = 18,986.00 × 7,789.32
  4. Step 4: Simplify right side
    13,757.81x = 147,887,990.57
  5. Step 5: Solve for x
    x = 147,887,990.57/13,757.81
  6. Step 6: Final answer
    x = 10,749.39

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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.