Home / 13,078.31-18,049.64-7,773.12

Finding the Fourth Proportional to 13,078.31, 18,049.64 and 7,773.12

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Solution

The fourth proportional to 13,078.31, 18,049.64 and 7,773.12 is: 10,727.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,078.31 : 18,049.64 = 7,773.12 : x
  2. Step 2: Convert to fraction form
    13,078.31/18,049.64 = 7,773.12/x
  3. Step 3: Cross multiply
    13,078.31x = 18,049.64 × 7,773.12
  4. Step 4: Simplify right side
    13,078.31x = 140,302,017.68
  5. Step 5: Solve for x
    x = 140,302,017.68/13,078.31
  6. Step 6: Final answer
    x = 10,727.84

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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.