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Finding the Fourth Proportional to 6,511.88, 8,987.13 and 3,680.39

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Solution

The fourth proportional to 6,511.88, 8,987.13 and 3,680.39 is: 5,079.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.88 : 8,987.13 = 3,680.39 : x
  2. Step 2: Convert to fraction form
    6,511.88/8,987.13 = 3,680.39/x
  3. Step 3: Cross multiply
    6,511.88x = 8,987.13 × 3,680.39
  4. Step 4: Simplify right side
    6,511.88x = 33,076,098.45
  5. Step 5: Solve for x
    x = 33,076,098.45/6,511.88
  6. Step 6: Final answer
    x = 5,079.35

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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.