Home / 3,558.87-4,911.57-1,987.47

Finding the Fourth Proportional to 3,558.87, 4,911.57 and 1,987.47

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Solution

The fourth proportional to 3,558.87, 4,911.57 and 1,987.47 is: 2,742.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,558.87 : 4,911.57 = 1,987.47 : x
  2. Step 2: Convert to fraction form
    3,558.87/4,911.57 = 1,987.47/x
  3. Step 3: Cross multiply
    3,558.87x = 4,911.57 × 1,987.47
  4. Step 4: Simplify right side
    3,558.87x = 9,761,598.03
  5. Step 5: Solve for x
    x = 9,761,598.03/3,558.87
  6. Step 6: Final answer
    x = 2,742.89

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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.