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Finding the Fourth Proportional to 6,659.68, 9,188.72 and 4,140.64

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Solution

The fourth proportional to 6,659.68, 9,188.72 and 4,140.64 is: 5,713.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,659.68 : 9,188.72 = 4,140.64 : x
  2. Step 2: Convert to fraction form
    6,659.68/9,188.72 = 4,140.64/x
  3. Step 3: Cross multiply
    6,659.68x = 9,188.72 × 4,140.64
  4. Step 4: Simplify right side
    6,659.68x = 38,047,181.58
  5. Step 5: Solve for x
    x = 38,047,181.58/6,659.68
  6. Step 6: Final answer
    x = 5,713.06

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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.