Home / 7,821.19-11,730.84-1,977.85

Finding the Fourth Proportional to 7,821.19, 11,730.84 and 1,977.85

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Solution

The fourth proportional to 7,821.19, 11,730.84 and 1,977.85 is: 2,966.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.19 : 11,730.84 = 1,977.85 : x
  2. Step 2: Convert to fraction form
    7,821.19/11,730.84 = 1,977.85/x
  3. Step 3: Cross multiply
    7,821.19x = 11,730.84 × 1,977.85
  4. Step 4: Simplify right side
    7,821.19x = 23,201,841.89
  5. Step 5: Solve for x
    x = 23,201,841.89/7,821.19
  6. Step 6: Final answer
    x = 2,966.54

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1.5x scale

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.