Home / 13,199.12-18,214.79-7,230.80

Finding the Fourth Proportional to 13,199.12, 18,214.79 and 7,230.80

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Solution

The fourth proportional to 13,199.12, 18,214.79 and 7,230.80 is: 9,978.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.12 : 18,214.79 = 7,230.80 : x
  2. Step 2: Convert to fraction form
    13,199.12/18,214.79 = 7,230.80/x
  3. Step 3: Cross multiply
    13,199.12x = 18,214.79 × 7,230.80
  4. Step 4: Simplify right side
    13,199.12x = 131,707,376.30
  5. Step 5: Solve for x
    x = 131,707,376.30/13,199.12
  6. Step 6: Final answer
    x = 9,978.50

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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.