Home / 13,199.40-18,215.20-7,230.94

Finding the Fourth Proportional to 13,199.40, 18,215.20 and 7,230.94

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Solution

The fourth proportional to 13,199.40, 18,215.20 and 7,230.94 is: 9,978.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,199.40 : 18,215.20 = 7,230.94 : x
  2. Step 2: Convert to fraction form
    13,199.40/18,215.20 = 7,230.94/x
  3. Step 3: Cross multiply
    13,199.40x = 18,215.20 × 7,230.94
  4. Step 4: Simplify right side
    13,199.40x = 131,712,982.13
  5. Step 5: Solve for x
    x = 131,712,982.13/13,199.40
  6. Step 6: Final answer
    x = 9,978.71

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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.