Home / 2,156.21-2,976.09-1,317.62

Finding the Fourth Proportional to 2,156.21, 2,976.09 and 1,317.62

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Solution

The fourth proportional to 2,156.21, 2,976.09 and 1,317.62 is: 1,818.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.21 : 2,976.09 = 1,317.62 : x
  2. Step 2: Convert to fraction form
    2,156.21/2,976.09 = 1,317.62/x
  3. Step 3: Cross multiply
    2,156.21x = 2,976.09 × 1,317.62
  4. Step 4: Simplify right side
    2,156.21x = 3,921,346.41
  5. Step 5: Solve for x
    x = 3,921,346.41/2,156.21
  6. Step 6: Final answer
    x = 1,818.63

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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.