Home / 3,559.11-4,911.13-1,987.50

Finding the Fourth Proportional to 3,559.11, 4,911.13 and 1,987.50

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Solution

The fourth proportional to 3,559.11, 4,911.13 and 1,987.50 is: 2,742.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,559.11 : 4,911.13 = 1,987.50 : x
  2. Step 2: Convert to fraction form
    3,559.11/4,911.13 = 1,987.50/x
  3. Step 3: Cross multiply
    3,559.11x = 4,911.13 × 1,987.50
  4. Step 4: Simplify right side
    3,559.11x = 9,760,870.88
  5. Step 5: Solve for x
    x = 9,760,870.88/3,559.11
  6. Step 6: Final answer
    x = 2,742.50

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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.