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Finding the Fourth Proportional to 9,720.44, 13,399.89 and 6,879.01

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Solution

The fourth proportional to 9,720.44, 13,399.89 and 6,879.01 is: 9,482.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,720.44 : 13,399.89 = 6,879.01 : x
  2. Step 2: Convert to fraction form
    9,720.44/13,399.89 = 6,879.01/x
  3. Step 3: Cross multiply
    9,720.44x = 13,399.89 × 6,879.01
  4. Step 4: Simplify right side
    9,720.44x = 92,177,977.31
  5. Step 5: Solve for x
    x = 92,177,977.31/9,720.44
  6. Step 6: Final answer
    x = 9,482.90

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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.