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Finding the Fourth Proportional to 18,954.81, 26,142.21 and 16,681.23

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Solution

The fourth proportional to 18,954.81, 26,142.21 and 16,681.23 is: 23,006.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.81 : 26,142.21 = 16,681.23 : x
  2. Step 2: Convert to fraction form
    18,954.81/26,142.21 = 16,681.23/x
  3. Step 3: Cross multiply
    18,954.81x = 26,142.21 × 16,681.23
  4. Step 4: Simplify right side
    18,954.81x = 436,084,217.72
  5. Step 5: Solve for x
    x = 436,084,217.72/18,954.81
  6. Step 6: Final answer
    x = 23,006.52

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Half scale
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Double scale
Find fourth proportional to 18,955.81, 26,143.59 and 16,682.23
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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.