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Finding the Fourth Proportional to 18,995.70, 28,498.80 and 7,907.60

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Solution

The fourth proportional to 18,995.70, 28,498.80 and 7,907.60 is: 11,863.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,995.70 : 28,498.80 = 7,907.60 : x
  2. Step 2: Convert to fraction form
    18,995.70/28,498.80 = 7,907.60/x
  3. Step 3: Cross multiply
    18,995.70x = 28,498.80 × 7,907.60
  4. Step 4: Simplify right side
    18,995.70x = 225,357,110.88
  5. Step 5: Solve for x
    x = 225,357,110.88/18,995.70
  6. Step 6: Final answer
    x = 11,863.59

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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.