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Finding the Fourth Proportional to 5,487.87, 8,231.85 and 1,980.36

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Solution

The fourth proportional to 5,487.87, 8,231.85 and 1,980.36 is: 2,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.87 : 8,231.85 = 1,980.36 : x
  2. Step 2: Convert to fraction form
    5,487.87/8,231.85 = 1,980.36/x
  3. Step 3: Cross multiply
    5,487.87x = 8,231.85 × 1,980.36
  4. Step 4: Simplify right side
    5,487.87x = 16,302,026.47
  5. Step 5: Solve for x
    x = 16,302,026.47/5,487.87
  6. Step 6: Final answer
    x = 2,970.56

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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.