Home / 13,720.20-18,936.50-8,056.20

Finding the Fourth Proportional to 13,720.20, 18,936.50 and 8,056.20

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Solution

The fourth proportional to 13,720.20, 18,936.50 and 8,056.20 is: 11,119.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.20 : 18,936.50 = 8,056.20 : x
  2. Step 2: Convert to fraction form
    13,720.20/18,936.50 = 8,056.20/x
  3. Step 3: Cross multiply
    13,720.20x = 18,936.50 × 8,056.20
  4. Step 4: Simplify right side
    13,720.20x = 152,556,231.30
  5. Step 5: Solve for x
    x = 152,556,231.30/13,720.20
  6. Step 6: Final answer
    x = 11,119.10

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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.