Home / 7,821.36-11,732.16-1,978.02

Finding the Fourth Proportional to 7,821.36, 11,732.16 and 1,978.02

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Solution

The fourth proportional to 7,821.36, 11,732.16 and 1,978.02 is: 2,967.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.36 : 11,732.16 = 1,978.02 : x
  2. Step 2: Convert to fraction form
    7,821.36/11,732.16 = 1,978.02/x
  3. Step 3: Cross multiply
    7,821.36x = 11,732.16 × 1,978.02
  4. Step 4: Simplify right side
    7,821.36x = 23,206,447.12
  5. Step 5: Solve for x
    x = 23,206,447.12/7,821.36
  6. Step 6: Final answer
    x = 2,967.06

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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.