Home / 1,821.12-2,515.36-1,808.32

Finding the Fourth Proportional to 1,821.12, 2,515.36 and 1,808.32

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Solution

The fourth proportional to 1,821.12, 2,515.36 and 1,808.32 is: 2,497.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.12 : 2,515.36 = 1,808.32 : x
  2. Step 2: Convert to fraction form
    1,821.12/2,515.36 = 1,808.32/x
  3. Step 3: Cross multiply
    1,821.12x = 2,515.36 × 1,808.32
  4. Step 4: Simplify right side
    1,821.12x = 4,548,575.80
  5. Step 5: Solve for x
    x = 4,548,575.80/1,821.12
  6. Step 6: Final answer
    x = 2,497.68

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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.