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Finding the Fourth Proportional to 6,489.61, 8,955.67 and 3,505.45

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Solution

The fourth proportional to 6,489.61, 8,955.67 and 3,505.45 is: 4,837.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489.61 : 8,955.67 = 3,505.45 : x
  2. Step 2: Convert to fraction form
    6,489.61/8,955.67 = 3,505.45/x
  3. Step 3: Cross multiply
    6,489.61x = 8,955.67 × 3,505.45
  4. Step 4: Simplify right side
    6,489.61x = 31,393,653.40
  5. Step 5: Solve for x
    x = 31,393,653.40/6,489.61
  6. Step 6: Final answer
    x = 4,837.53

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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.