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Finding the Fourth Proportional to 18,478.26, 27,698.72 and 7,955.15

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Solution

The fourth proportional to 18,478.26, 27,698.72 and 7,955.15 is: 11,924.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.26 : 27,698.72 = 7,955.15 : x
  2. Step 2: Convert to fraction form
    18,478.26/27,698.72 = 7,955.15/x
  3. Step 3: Cross multiply
    18,478.26x = 27,698.72 × 7,955.15
  4. Step 4: Simplify right side
    18,478.26x = 220,347,294.14
  5. Step 5: Solve for x
    x = 220,347,294.14/18,478.26
  6. Step 6: Final answer
    x = 11,924.68

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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.