Home / 3,111.12-4,668.12-1,380.24

Finding the Fourth Proportional to 3,111.12, 4,668.12 and 1,380.24

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Solution

The fourth proportional to 3,111.12, 4,668.12 and 1,380.24 is: 2,071.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.12 : 4,668.12 = 1,380.24 : x
  2. Step 2: Convert to fraction form
    3,111.12/4,668.12 = 1,380.24/x
  3. Step 3: Cross multiply
    3,111.12x = 4,668.12 × 1,380.24
  4. Step 4: Simplify right side
    3,111.12x = 6,443,125.95
  5. Step 5: Solve for x
    x = 6,443,125.95/3,111.12
  6. Step 6: Final answer
    x = 2,071.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.