Home / 13,393.81-20,079.37-8,188.75

Finding the Fourth Proportional to 13,393.81, 20,079.37 and 8,188.75

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Solution

The fourth proportional to 13,393.81, 20,079.37 and 8,188.75 is: 12,276.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.81 : 20,079.37 = 8,188.75 : x
  2. Step 2: Convert to fraction form
    13,393.81/20,079.37 = 8,188.75/x
  3. Step 3: Cross multiply
    13,393.81x = 20,079.37 × 8,188.75
  4. Step 4: Simplify right side
    13,393.81x = 164,424,941.09
  5. Step 5: Solve for x
    x = 164,424,941.09/13,393.81
  6. Step 6: Final answer
    x = 12,276.19

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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.