Home / 7,821.64-11,732.04-1,977.92

Finding the Fourth Proportional to 7,821.64, 11,732.04 and 1,977.92

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Solution

The fourth proportional to 7,821.64, 11,732.04 and 1,977.92 is: 2,966.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.64 : 11,732.04 = 1,977.92 : x
  2. Step 2: Convert to fraction form
    7,821.64/11,732.04 = 1,977.92/x
  3. Step 3: Cross multiply
    7,821.64x = 11,732.04 × 1,977.92
  4. Step 4: Simplify right side
    7,821.64x = 23,205,036.56
  5. Step 5: Solve for x
    x = 23,205,036.56/7,821.64
  6. Step 6: Final answer
    x = 2,966.77

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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.