Home / 3,130.76-4,317.09-2,638.82

Finding the Fourth Proportional to 3,130.76, 4,317.09 and 2,638.82

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Solution

The fourth proportional to 3,130.76, 4,317.09 and 2,638.82 is: 3,638.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.76 : 4,317.09 = 2,638.82 : x
  2. Step 2: Convert to fraction form
    3,130.76/4,317.09 = 2,638.82/x
  3. Step 3: Cross multiply
    3,130.76x = 4,317.09 × 2,638.82
  4. Step 4: Simplify right side
    3,130.76x = 11,392,023.43
  5. Step 5: Solve for x
    x = 11,392,023.43/3,130.76
  6. Step 6: Final answer
    x = 3,638.74

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Half scale
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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.