Home / 2,670.80-3,986.68-2,478.08

Finding the Fourth Proportional to 2,670.80, 3,986.68 and 2,478.08

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Solution

The fourth proportional to 2,670.80, 3,986.68 and 2,478.08 is: 3,699.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,670.80 : 3,986.68 = 2,478.08 : x
  2. Step 2: Convert to fraction form
    2,670.80/3,986.68 = 2,478.08/x
  3. Step 3: Cross multiply
    2,670.80x = 3,986.68 × 2,478.08
  4. Step 4: Simplify right side
    2,670.80x = 9,879,311.97
  5. Step 5: Solve for x
    x = 9,879,311.97/2,670.80
  6. Step 6: Final answer
    x = 3,699.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.