Home / 13,690.26-18,892.84-7,720.79

Finding the Fourth Proportional to 13,690.26, 18,892.84 and 7,720.79

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Solution

The fourth proportional to 13,690.26, 18,892.84 and 7,720.79 is: 10,654.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.26 : 18,892.84 = 7,720.79 : x
  2. Step 2: Convert to fraction form
    13,690.26/18,892.84 = 7,720.79/x
  3. Step 3: Cross multiply
    13,690.26x = 18,892.84 × 7,720.79
  4. Step 4: Simplify right side
    13,690.26x = 145,867,555.68
  5. Step 5: Solve for x
    x = 145,867,555.68/13,690.26
  6. Step 6: Final answer
    x = 10,654.84

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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.