Home / 6,151.39-8,490.30-3,911.51

Finding the Fourth Proportional to 6,151.39, 8,490.30 and 3,911.51

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Solution

The fourth proportional to 6,151.39, 8,490.30 and 3,911.51 is: 5,398.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,151.39 : 8,490.30 = 3,911.51 : x
  2. Step 2: Convert to fraction form
    6,151.39/8,490.30 = 3,911.51/x
  3. Step 3: Cross multiply
    6,151.39x = 8,490.30 × 3,911.51
  4. Step 4: Simplify right side
    6,151.39x = 33,209,893.35
  5. Step 5: Solve for x
    x = 33,209,893.35/6,151.39
  6. Step 6: Final answer
    x = 5,398.76

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Half scale
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Double 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.