Home / 4,721.20-7,078.60-2,642.64

Finding the Fourth Proportional to 4,721.20, 7,078.60 and 2,642.64

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Solution

The fourth proportional to 4,721.20, 7,078.60 and 2,642.64 is: 3,962.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,721.20 : 7,078.60 = 2,642.64 : x
  2. Step 2: Convert to fraction form
    4,721.20/7,078.60 = 2,642.64/x
  3. Step 3: Cross multiply
    4,721.20x = 7,078.60 × 2,642.64
  4. Step 4: Simplify right side
    4,721.20x = 18,706,168.26
  5. Step 5: Solve for x
    x = 18,706,168.26/4,721.20
  6. Step 6: Final answer
    x = 3,962.17

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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.