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Finding the Fourth Proportional to 6,511.77, 8,985.78 and 3,679.47

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Solution

The fourth proportional to 6,511.77, 8,985.78 and 3,679.47 is: 5,077.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.77 : 8,985.78 = 3,679.47 : x
  2. Step 2: Convert to fraction form
    6,511.77/8,985.78 = 3,679.47/x
  3. Step 3: Cross multiply
    6,511.77x = 8,985.78 × 3,679.47
  4. Step 4: Simplify right side
    6,511.77x = 33,062,907.94
  5. Step 5: Solve for x
    x = 33,062,907.94/6,511.77
  6. Step 6: Final answer
    x = 5,077.41

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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.