Home / 13,539.15-18,683.82-7,406.82

Finding the Fourth Proportional to 13,539.15, 18,683.82 and 7,406.82

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Solution

The fourth proportional to 13,539.15, 18,683.82 and 7,406.82 is: 10,221.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,539.15 : 18,683.82 = 7,406.82 : x
  2. Step 2: Convert to fraction form
    13,539.15/18,683.82 = 7,406.82/x
  3. Step 3: Cross multiply
    13,539.15x = 18,683.82 × 7,406.82
  4. Step 4: Simplify right side
    13,539.15x = 138,387,691.65
  5. Step 5: Solve for x
    x = 138,387,691.65/13,539.15
  6. Step 6: Final answer
    x = 10,221.30

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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.