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Finding the Fourth Proportional to 6,403.13, 8,836.31 and 3,608.63

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Solution

The fourth proportional to 6,403.13, 8,836.31 and 3,608.63 is: 4,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,403.13 : 8,836.31 = 3,608.63 : x
  2. Step 2: Convert to fraction form
    6,403.13/8,836.31 = 3,608.63/x
  3. Step 3: Cross multiply
    6,403.13x = 8,836.31 × 3,608.63
  4. Step 4: Simplify right side
    6,403.13x = 31,886,938.20
  5. Step 5: Solve for x
    x = 31,886,938.20/6,403.13
  6. Step 6: Final answer
    x = 4,979.90

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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.