Home / 13,540.40-20,322.60-7,986.80

Finding the Fourth Proportional to 13,540.40, 20,322.60 and 7,986.80

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Solution

The fourth proportional to 13,540.40, 20,322.60 and 7,986.80 is: 11,987.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,540.40 : 20,322.60 = 7,986.80 : x
  2. Step 2: Convert to fraction form
    13,540.40/20,322.60 = 7,986.80/x
  3. Step 3: Cross multiply
    13,540.40x = 20,322.60 × 7,986.80
  4. Step 4: Simplify right side
    13,540.40x = 162,312,541.68
  5. Step 5: Solve for x
    x = 162,312,541.68/13,540.40
  6. Step 6: Final answer
    x = 11,987.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.