Home / 2,040.21-2,815.47-1,108.71

Finding the Fourth Proportional to 2,040.21, 2,815.47 and 1,108.71

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Solution

The fourth proportional to 2,040.21, 2,815.47 and 1,108.71 is: 1,530.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,040.21 : 2,815.47 = 1,108.71 : x
  2. Step 2: Convert to fraction form
    2,040.21/2,815.47 = 1,108.71/x
  3. Step 3: Cross multiply
    2,040.21x = 2,815.47 × 1,108.71
  4. Step 4: Simplify right side
    2,040.21x = 3,121,539.74
  5. Step 5: Solve for x
    x = 3,121,539.74/2,040.21
  6. Step 6: Final answer
    x = 1,530.01

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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.