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Finding the Fourth Proportional to 18,649.39, 27,961.78 and 7,543.07

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Solution

The fourth proportional to 18,649.39, 27,961.78 and 7,543.07 is: 11,309.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649.39 : 27,961.78 = 7,543.07 : x
  2. Step 2: Convert to fraction form
    18,649.39/27,961.78 = 7,543.07/x
  3. Step 3: Cross multiply
    18,649.39x = 27,961.78 × 7,543.07
  4. Step 4: Simplify right side
    18,649.39x = 210,917,802.70
  5. Step 5: Solve for x
    x = 210,917,802.70/18,649.39
  6. Step 6: Final answer
    x = 11,309.64

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1.5x scale

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.