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Finding the Fourth Proportional to 6,991.76, 9,647.16 and 4,007.36

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Solution

The fourth proportional to 6,991.76, 9,647.16 and 4,007.36 is: 5,529.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.76 : 9,647.16 = 4,007.36 : x
  2. Step 2: Convert to fraction form
    6,991.76/9,647.16 = 4,007.36/x
  3. Step 3: Cross multiply
    6,991.76x = 9,647.16 × 4,007.36
  4. Step 4: Simplify right side
    6,991.76x = 38,659,643.10
  5. Step 5: Solve for x
    x = 38,659,643.10/6,991.76
  6. Step 6: Final answer
    x = 5,529.31

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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.