Home / 13,289.06-18,327.94-7,980.12

Finding the Fourth Proportional to 13,289.06, 18,327.94 and 7,980.12

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Solution

The fourth proportional to 13,289.06, 18,327.94 and 7,980.12 is: 11,005.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289.06 : 18,327.94 = 7,980.12 : x
  2. Step 2: Convert to fraction form
    13,289.06/18,327.94 = 7,980.12/x
  3. Step 3: Cross multiply
    13,289.06x = 18,327.94 × 7,980.12
  4. Step 4: Simplify right side
    13,289.06x = 146,259,140.60
  5. Step 5: Solve for x
    x = 146,259,140.60/13,289.06
  6. Step 6: Final answer
    x = 11,005.98

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Similar ratio
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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.