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Finding the Fourth Proportional to 18,927.99, 28,391.99 and 6,448.32

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Solution

The fourth proportional to 18,927.99, 28,391.99 and 6,448.32 is: 9,672.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.99 : 28,391.99 = 6,448.32 : x
  2. Step 2: Convert to fraction form
    18,927.99/28,391.99 = 6,448.32/x
  3. Step 3: Cross multiply
    18,927.99x = 28,391.99 × 6,448.32
  4. Step 4: Simplify right side
    18,927.99x = 183,080,604.72
  5. Step 5: Solve for x
    x = 183,080,604.72/18,927.99
  6. Step 6: Final answer
    x = 9,672.48

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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.