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Finding the Fourth Proportional to 6,289, 8,678.32 and 3,636.58

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Solution

The fourth proportional to 6,289, 8,678.32 and 3,636.58 is: 5,018.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,289 : 8,678.32 = 3,636.58 : x
  2. Step 2: Convert to fraction form
    6,289/8,678.32 = 3,636.58/x
  3. Step 3: Cross multiply
    6,289x = 8,678.32 × 3,636.58
  4. Step 4: Simplify right side
    6,289x = 31,559,404.95
  5. Step 5: Solve for x
    x = 31,559,404.95/6,289
  6. Step 6: Final answer
    x = 5,018.19

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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.