Home / 13,810.40-20,731.80-8,268.80

Finding the Fourth Proportional to 13,810.40, 20,731.80 and 8,268.80

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Solution

The fourth proportional to 13,810.40, 20,731.80 and 8,268.80 is: 12,412.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,810.40 : 20,731.80 = 8,268.80 : x
  2. Step 2: Convert to fraction form
    13,810.40/20,731.80 = 8,268.80/x
  3. Step 3: Cross multiply
    13,810.40x = 20,731.80 × 8,268.80
  4. Step 4: Simplify right side
    13,810.40x = 171,427,107.84
  5. Step 5: Solve for x
    x = 171,427,107.84/13,810.40
  6. Step 6: Final answer
    x = 12,412.90

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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.