Home / 5,178.30-7,762.79-1,889.09

Finding the Fourth Proportional to 5,178.30, 7,762.79 and 1,889.09

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Solution

The fourth proportional to 5,178.30, 7,762.79 and 1,889.09 is: 2,831.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.30 : 7,762.79 = 1,889.09 : x
  2. Step 2: Convert to fraction form
    5,178.30/7,762.79 = 1,889.09/x
  3. Step 3: Cross multiply
    5,178.30x = 7,762.79 × 1,889.09
  4. Step 4: Simplify right side
    5,178.30x = 14,664,560.70
  5. Step 5: Solve for x
    x = 14,664,560.70/5,178.30
  6. Step 6: Final answer
    x = 2,831.93

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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.