Home / 13,720.08-18,932.72-8,055.06

Finding the Fourth Proportional to 13,720.08, 18,932.72 and 8,055.06

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Solution

The fourth proportional to 13,720.08, 18,932.72 and 8,055.06 is: 11,115.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.08 : 18,932.72 = 8,055.06 : x
  2. Step 2: Convert to fraction form
    13,720.08/18,932.72 = 8,055.06/x
  3. Step 3: Cross multiply
    13,720.08x = 18,932.72 × 8,055.06
  4. Step 4: Simplify right side
    13,720.08x = 152,504,195.56
  5. Step 5: Solve for x
    x = 152,504,195.56/13,720.08
  6. Step 6: Final answer
    x = 11,115.40

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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.