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Finding the Fourth Proportional to 6,720, 9,249.12 and 5,918.06

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Solution

The fourth proportional to 6,720, 9,249.12 and 5,918.06 is: 8,145.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,720 : 9,249.12 = 5,918.06 : x
  2. Step 2: Convert to fraction form
    6,720/9,249.12 = 5,918.06/x
  3. Step 3: Cross multiply
    6,720x = 9,249.12 × 5,918.06
  4. Step 4: Simplify right side
    6,720x = 54,736,847.11
  5. Step 5: Solve for x
    x = 54,736,847.11/6,720
  6. Step 6: Final answer
    x = 8,145.36

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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.