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Finding the Fourth Proportional to 6,661.28, 10,003.06 and 6,396.40

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Solution

The fourth proportional to 6,661.28, 10,003.06 and 6,396.40 is: 9,605.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.28 : 10,003.06 = 6,396.40 : x
  2. Step 2: Convert to fraction form
    6,661.28/10,003.06 = 6,396.40/x
  3. Step 3: Cross multiply
    6,661.28x = 10,003.06 × 6,396.40
  4. Step 4: Simplify right side
    6,661.28x = 63,983,572.98
  5. Step 5: Solve for x
    x = 63,983,572.98/6,661.28
  6. Step 6: Final answer
    x = 9,605.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.