Home / 7,621.80-10,515.78-4,476.20

Finding the Fourth Proportional to 7,621.80, 10,515.78 and 4,476.20

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Solution

The fourth proportional to 7,621.80, 10,515.78 and 4,476.20 is: 6,175.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.80 : 10,515.78 = 4,476.20 : x
  2. Step 2: Convert to fraction form
    7,621.80/10,515.78 = 4,476.20/x
  3. Step 3: Cross multiply
    7,621.80x = 10,515.78 × 4,476.20
  4. Step 4: Simplify right side
    7,621.80x = 47,070,734.44
  5. Step 5: Solve for x
    x = 47,070,734.44/7,621.80
  6. Step 6: Final answer
    x = 6,175.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.