Home / 2,106.64-3,159.98-1,380.81

Finding the Fourth Proportional to 2,106.64, 3,159.98 and 1,380.81

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Solution

The fourth proportional to 2,106.64, 3,159.98 and 1,380.81 is: 2,071.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.64 : 3,159.98 = 1,380.81 : x
  2. Step 2: Convert to fraction form
    2,106.64/3,159.98 = 1,380.81/x
  3. Step 3: Cross multiply
    2,106.64x = 3,159.98 × 1,380.81
  4. Step 4: Simplify right side
    2,106.64x = 4,363,342.11
  5. Step 5: Solve for x
    x = 4,363,342.11/2,106.64
  6. Step 6: Final answer
    x = 2,071.23

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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.