Home / 8,323.40-12,486.86-3,129.32

Finding the Fourth Proportional to 8,323.40, 12,486.86 and 3,129.32

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Solution

The fourth proportional to 8,323.40, 12,486.86 and 3,129.32 is: 4,694.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,323.40 : 12,486.86 = 3,129.32 : x
  2. Step 2: Convert to fraction form
    8,323.40/12,486.86 = 3,129.32/x
  3. Step 3: Cross multiply
    8,323.40x = 12,486.86 × 3,129.32
  4. Step 4: Simplify right side
    8,323.40x = 39,075,380.74
  5. Step 5: Solve for x
    x = 39,075,380.74/8,323.40
  6. Step 6: Final answer
    x = 4,694.64

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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.