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Finding the Fourth Proportional to 30,605.94, 42,236.98 and 17,178.22

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Solution

The fourth proportional to 30,605.94, 42,236.98 and 17,178.22 is: 23,706.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,605.94 : 42,236.98 = 17,178.22 : x
  2. Step 2: Convert to fraction form
    30,605.94/42,236.98 = 17,178.22/x
  3. Step 3: Cross multiply
    30,605.94x = 42,236.98 × 17,178.22
  4. Step 4: Simplify right side
    30,605.94x = 725,556,134.58
  5. Step 5: Solve for x
    x = 725,556,134.58/30,605.94
  6. Step 6: Final answer
    x = 23,706.38

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Half scale
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Double scale
Find fourth proportional to 30,606.94, 42,238.36 and 17,179.22
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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.