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Finding the Fourth Proportional to 18,243.70, 27,173.82 and 17,390.50

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Solution

The fourth proportional to 18,243.70, 27,173.82 and 17,390.50 is: 25,902.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.70 : 27,173.82 = 17,390.50 : x
  2. Step 2: Convert to fraction form
    18,243.70/27,173.82 = 17,390.50/x
  3. Step 3: Cross multiply
    18,243.70x = 27,173.82 × 17,390.50
  4. Step 4: Simplify right side
    18,243.70x = 472,566,316.71
  5. Step 5: Solve for x
    x = 472,566,316.71/18,243.70
  6. Step 6: Final answer
    x = 25,902.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.