Home / 5,440.90-8,161.63-1,978.02

Finding the Fourth Proportional to 5,440.90, 8,161.63 and 1,978.02

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Solution

The fourth proportional to 5,440.90, 8,161.63 and 1,978.02 is: 2,967.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,440.90 : 8,161.63 = 1,978.02 : x
  2. Step 2: Convert to fraction form
    5,440.90/8,161.63 = 1,978.02/x
  3. Step 3: Cross multiply
    5,440.90x = 8,161.63 × 1,978.02
  4. Step 4: Simplify right side
    5,440.90x = 16,143,867.37
  5. Step 5: Solve for x
    x = 16,143,867.37/5,440.90
  6. Step 6: Final answer
    x = 2,967.13

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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.