Home / 2,111.60-3,167.40-1,138.16

Finding the Fourth Proportional to 2,111.60, 3,167.40 and 1,138.16

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Solution

The fourth proportional to 2,111.60, 3,167.40 and 1,138.16 is: 1,707.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.60 : 3,167.40 = 1,138.16 : x
  2. Step 2: Convert to fraction form
    2,111.60/3,167.40 = 1,138.16/x
  3. Step 3: Cross multiply
    2,111.60x = 3,167.40 × 1,138.16
  4. Step 4: Simplify right side
    2,111.60x = 3,605,007.98
  5. Step 5: Solve for x
    x = 3,605,007.98/2,111.60
  6. Step 6: Final answer
    x = 1,707.24

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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.