Home / 13,938.90-20,908.35-8,009.70

Finding the Fourth Proportional to 13,938.90, 20,908.35 and 8,009.70

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Solution

The fourth proportional to 13,938.90, 20,908.35 and 8,009.70 is: 12,014.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.90 : 20,908.35 = 8,009.70 : x
  2. Step 2: Convert to fraction form
    13,938.90/20,908.35 = 8,009.70/x
  3. Step 3: Cross multiply
    13,938.90x = 20,908.35 × 8,009.70
  4. Step 4: Simplify right side
    13,938.90x = 167,469,611.00
  5. Step 5: Solve for x
    x = 167,469,611.00/13,938.90
  6. Step 6: Final answer
    x = 12,014.55

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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.