Home / 2,911.80-4,016.88-1,863.12

Finding the Fourth Proportional to 2,911.80, 4,016.88 and 1,863.12

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Solution

The fourth proportional to 2,911.80, 4,016.88 and 1,863.12 is: 2,570.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.80 : 4,016.88 = 1,863.12 : x
  2. Step 2: Convert to fraction form
    2,911.80/4,016.88 = 1,863.12/x
  3. Step 3: Cross multiply
    2,911.80x = 4,016.88 × 1,863.12
  4. Step 4: Simplify right side
    2,911.80x = 7,483,929.47
  5. Step 5: Solve for x
    x = 7,483,929.47/2,911.80
  6. Step 6: Final answer
    x = 2,570.21

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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.