Home / 13,200.98-18,216.40-7,231.68

Finding the Fourth Proportional to 13,200.98, 18,216.40 and 7,231.68

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Solution

The fourth proportional to 13,200.98, 18,216.40 and 7,231.68 is: 9,979.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,200.98 : 18,216.40 = 7,231.68 : x
  2. Step 2: Convert to fraction form
    13,200.98/18,216.40 = 7,231.68/x
  3. Step 3: Cross multiply
    13,200.98x = 18,216.40 × 7,231.68
  4. Step 4: Simplify right side
    13,200.98x = 131,735,175.55
  5. Step 5: Solve for x
    x = 131,735,175.55/13,200.98
  6. Step 6: Final answer
    x = 9,979.20

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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.