Home / 3,559.28-4,911.84-1,987.40

Finding the Fourth Proportional to 3,559.28, 4,911.84 and 1,987.40

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Solution

The fourth proportional to 3,559.28, 4,911.84 and 1,987.40 is: 2,742.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,559.28 : 4,911.84 = 1,987.40 : x
  2. Step 2: Convert to fraction form
    3,559.28/4,911.84 = 1,987.40/x
  3. Step 3: Cross multiply
    3,559.28x = 4,911.84 × 1,987.40
  4. Step 4: Simplify right side
    3,559.28x = 9,761,790.82
  5. Step 5: Solve for x
    x = 9,761,790.82/3,559.28
  6. Step 6: Final answer
    x = 2,742.63

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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.