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Finding the Fourth Proportional to 6,489.56, 8,955.59 and 3,505.40

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Solution

The fourth proportional to 6,489.56, 8,955.59 and 3,505.40 is: 4,837.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.56 : 8,955.59 = 3,505.40 : x
  2. Step 2: Convert to fraction form
    6,489.56/8,955.59 = 3,505.40/x
  3. Step 3: Cross multiply
    6,489.56x = 8,955.59 × 3,505.40
  4. Step 4: Simplify right side
    6,489.56x = 31,392,862.88
  5. Step 5: Solve for x
    x = 31,392,862.88/6,489.56
  6. Step 6: Final answer
    x = 4,837.44

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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.