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Finding the Fourth Proportional to 18,943.47, 28,371.47 and 18,287.37

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Solution

The fourth proportional to 18,943.47, 28,371.47 and 18,287.37 is: 27,388.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,943.47 : 28,371.47 = 18,287.37 : x
  2. Step 2: Convert to fraction form
    18,943.47/28,371.47 = 18,287.37/x
  3. Step 3: Cross multiply
    18,943.47x = 28,371.47 × 18,287.37
  4. Step 4: Simplify right side
    18,943.47x = 518,839,477.90
  5. Step 5: Solve for x
    x = 518,839,477.90/18,943.47
  6. Step 6: Final answer
    x = 27,388.83

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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.