Home / 3,117.36-4,302.60-1,939.20

Finding the Fourth Proportional to 3,117.36, 4,302.60 and 1,939.20

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Solution

The fourth proportional to 3,117.36, 4,302.60 and 1,939.20 is: 2,676.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,117.36 : 4,302.60 = 1,939.20 : x
  2. Step 2: Convert to fraction form
    3,117.36/4,302.60 = 1,939.20/x
  3. Step 3: Cross multiply
    3,117.36x = 4,302.60 × 1,939.20
  4. Step 4: Simplify right side
    3,117.36x = 8,343,601.92
  5. Step 5: Solve for x
    x = 8,343,601.92/3,117.36
  6. Step 6: Final answer
    x = 2,676.50

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Half scale
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Similar ratio
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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.