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Finding the Fourth Proportional to 18,554.54, 25,639.17 and 13,509.97

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Solution

The fourth proportional to 18,554.54, 25,639.17 and 13,509.97 is: 18,668.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,554.54 : 25,639.17 = 13,509.97 : x
  2. Step 2: Convert to fraction form
    18,554.54/25,639.17 = 13,509.97/x
  3. Step 3: Cross multiply
    18,554.54x = 25,639.17 × 13,509.97
  4. Step 4: Simplify right side
    18,554.54x = 346,384,349.98
  5. Step 5: Solve for x
    x = 346,384,349.98/18,554.54
  6. Step 6: Final answer
    x = 18,668.45

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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.