Home / 2,143.11-3,216.12-1,103.07

Finding the Fourth Proportional to 2,143.11, 3,216.12 and 1,103.07

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Solution

The fourth proportional to 2,143.11, 3,216.12 and 1,103.07 is: 1,655.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.11 : 3,216.12 = 1,103.07 : x
  2. Step 2: Convert to fraction form
    2,143.11/3,216.12 = 1,103.07/x
  3. Step 3: Cross multiply
    2,143.11x = 3,216.12 × 1,103.07
  4. Step 4: Simplify right side
    2,143.11x = 3,547,605.49
  5. Step 5: Solve for x
    x = 3,547,605.49/2,143.11
  6. Step 6: Final answer
    x = 1,655.35

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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.