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Finding the Fourth Proportional to 6,486.58, 8,948.28 and 4,129.48

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Solution

The fourth proportional to 6,486.58, 8,948.28 and 4,129.48 is: 5,696.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,486.58 : 8,948.28 = 4,129.48 : x
  2. Step 2: Convert to fraction form
    6,486.58/8,948.28 = 4,129.48/x
  3. Step 3: Cross multiply
    6,486.58x = 8,948.28 × 4,129.48
  4. Step 4: Simplify right side
    6,486.58x = 36,951,743.29
  5. Step 5: Solve for x
    x = 36,951,743.29/6,486.58
  6. Step 6: Final answer
    x = 5,696.64

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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.