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Finding the Fourth Proportional to 6,643.62, 9,966.86 and 3,313.66

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Solution

The fourth proportional to 6,643.62, 9,966.86 and 3,313.66 is: 4,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.62 : 9,966.86 = 3,313.66 : x
  2. Step 2: Convert to fraction form
    6,643.62/9,966.86 = 3,313.66/x
  3. Step 3: Cross multiply
    6,643.62x = 9,966.86 × 3,313.66
  4. Step 4: Simplify right side
    6,643.62x = 33,026,779.60
  5. Step 5: Solve for x
    x = 33,026,779.60/6,643.62
  6. Step 6: Final answer
    x = 4,971.20

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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.