Home / 5,109.63-7,664.94-1,989.87

Finding the Fourth Proportional to 5,109.63, 7,664.94 and 1,989.87

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Solution

The fourth proportional to 5,109.63, 7,664.94 and 1,989.87 is: 2,985.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,109.63 : 7,664.94 = 1,989.87 : x
  2. Step 2: Convert to fraction form
    5,109.63/7,664.94 = 1,989.87/x
  3. Step 3: Cross multiply
    5,109.63x = 7,664.94 × 1,989.87
  4. Step 4: Simplify right side
    5,109.63x = 15,252,234.16
  5. Step 5: Solve for x
    x = 15,252,234.16/5,109.63
  6. Step 6: Final answer
    x = 2,985.00

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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.