Home / 3,153.20-4,729.80-2,181.20

Finding the Fourth Proportional to 3,153.20, 4,729.80 and 2,181.20

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Solution

The fourth proportional to 3,153.20, 4,729.80 and 2,181.20 is: 3,271.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,153.20 : 4,729.80 = 2,181.20 : x
  2. Step 2: Convert to fraction form
    3,153.20/4,729.80 = 2,181.20/x
  3. Step 3: Cross multiply
    3,153.20x = 4,729.80 × 2,181.20
  4. Step 4: Simplify right side
    3,153.20x = 10,316,639.76
  5. Step 5: Solve for x
    x = 10,316,639.76/3,153.20
  6. Step 6: Final answer
    x = 3,271.80

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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.