Home / 2,988.12-4,121.37-1,807.68

Finding the Fourth Proportional to 2,988.12, 4,121.37 and 1,807.68

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Solution

The fourth proportional to 2,988.12, 4,121.37 and 1,807.68 is: 2,493.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.12 : 4,121.37 = 1,807.68 : x
  2. Step 2: Convert to fraction form
    2,988.12/4,121.37 = 1,807.68/x
  3. Step 3: Cross multiply
    2,988.12x = 4,121.37 × 1,807.68
  4. Step 4: Simplify right side
    2,988.12x = 7,450,118.12
  5. Step 5: Solve for x
    x = 7,450,118.12/2,988.12
  6. Step 6: Final answer
    x = 2,493.25

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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.