Home / 6,511.80-8,987.17-3,993.46

Finding the Fourth Proportional to 6,511.80, 8,987.17 and 3,993.46

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Solution

The fourth proportional to 6,511.80, 8,987.17 and 3,993.46 is: 5,511.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,511.80 : 8,987.17 = 3,993.46 : x
  2. Step 2: Convert to fraction form
    6,511.80/8,987.17 = 3,993.46/x
  3. Step 3: Cross multiply
    6,511.80x = 8,987.17 × 3,993.46
  4. Step 4: Simplify right side
    6,511.80x = 35,889,903.91
  5. Step 5: Solve for x
    x = 35,889,903.91/6,511.80
  6. Step 6: Final answer
    x = 5,511.52

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Half scale
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Double scale
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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.