Home / 2,811.13-4,216.70-1,515.13

Finding the Fourth Proportional to 2,811.13, 4,216.70 and 1,515.13

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Solution

The fourth proportional to 2,811.13, 4,216.70 and 1,515.13 is: 2,272.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.13 : 4,216.70 = 1,515.13 : x
  2. Step 2: Convert to fraction form
    2,811.13/4,216.70 = 1,515.13/x
  3. Step 3: Cross multiply
    2,811.13x = 4,216.70 × 1,515.13
  4. Step 4: Simplify right side
    2,811.13x = 6,388,848.67
  5. Step 5: Solve for x
    x = 6,388,848.67/2,811.13
  6. Step 6: Final answer
    x = 2,272.70

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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.