Home / 4,987.60-6,880.08-2,891.44

Finding the Fourth Proportional to 4,987.60, 6,880.08 and 2,891.44

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Solution

The fourth proportional to 4,987.60, 6,880.08 and 2,891.44 is: 3,988.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,987.60 : 6,880.08 = 2,891.44 : x
  2. Step 2: Convert to fraction form
    4,987.60/6,880.08 = 2,891.44/x
  3. Step 3: Cross multiply
    4,987.60x = 6,880.08 × 2,891.44
  4. Step 4: Simplify right side
    4,987.60x = 19,893,338.52
  5. Step 5: Solve for x
    x = 19,893,338.52/4,987.60
  6. Step 6: Final answer
    x = 3,988.56

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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.