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Finding the Fourth Proportional to 18,453.99, 27,639.37 and 8,572.47

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Solution

The fourth proportional to 18,453.99, 27,639.37 and 8,572.47 is: 12,839.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,453.99 : 27,639.37 = 8,572.47 : x
  2. Step 2: Convert to fraction form
    18,453.99/27,639.37 = 8,572.47/x
  3. Step 3: Cross multiply
    18,453.99x = 27,639.37 × 8,572.47
  4. Step 4: Simplify right side
    18,453.99x = 236,937,696.38
  5. Step 5: Solve for x
    x = 236,937,696.38/18,453.99
  6. Step 6: Final answer
    x = 12,839.38

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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.