Home / 4,118.40-5,680.80-2,721.60

Finding the Fourth Proportional to 4,118.40, 5,680.80 and 2,721.60

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Solution

The fourth proportional to 4,118.40, 5,680.80 and 2,721.60 is: 3,754.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,118.40 : 5,680.80 = 2,721.60 : x
  2. Step 2: Convert to fraction form
    4,118.40/5,680.80 = 2,721.60/x
  3. Step 3: Cross multiply
    4,118.40x = 5,680.80 × 2,721.60
  4. Step 4: Simplify right side
    4,118.40x = 15,460,865.28
  5. Step 5: Solve for x
    x = 15,460,865.28/4,118.40
  6. Step 6: Final answer
    x = 3,754.10

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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.