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Finding the Fourth Proportional to 5,631.88, 8,444.79 and 3,991.63

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Solution

The fourth proportional to 5,631.88, 8,444.79 and 3,991.63 is: 5,985.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,631.88 : 8,444.79 = 3,991.63 : x
  2. Step 2: Convert to fraction form
    5,631.88/8,444.79 = 3,991.63/x
  3. Step 3: Cross multiply
    5,631.88x = 8,444.79 × 3,991.63
  4. Step 4: Simplify right side
    5,631.88x = 33,708,477.11
  5. Step 5: Solve for x
    x = 33,708,477.11/5,631.88
  6. Step 6: Final answer
    x = 5,985.30

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.