Home / 8,429.20-12,643.80-2,880.70

Finding the Fourth Proportional to 8,429.20, 12,643.80 and 2,880.70

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Solution

The fourth proportional to 8,429.20, 12,643.80 and 2,880.70 is: 4,321.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.20 : 12,643.80 = 2,880.70 : x
  2. Step 2: Convert to fraction form
    8,429.20/12,643.80 = 2,880.70/x
  3. Step 3: Cross multiply
    8,429.20x = 12,643.80 × 2,880.70
  4. Step 4: Simplify right side
    8,429.20x = 36,422,994.66
  5. Step 5: Solve for x
    x = 36,422,994.66/8,429.20
  6. Step 6: Final answer
    x = 4,321.05

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Similar ratio
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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.