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Finding the Fourth Proportional to 28,521.70, 42,794.70 and 17,999.80

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Solution

The fourth proportional to 28,521.70, 42,794.70 and 17,999.80 is: 27,007.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,521.70 : 42,794.70 = 17,999.80 : x
  2. Step 2: Convert to fraction form
    28,521.70/42,794.70 = 17,999.80/x
  3. Step 3: Cross multiply
    28,521.70x = 42,794.70 × 17,999.80
  4. Step 4: Simplify right side
    28,521.70x = 770,296,041.06
  5. Step 5: Solve for x
    x = 770,296,041.06/28,521.70
  6. Step 6: Final answer
    x = 27,007.37

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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.