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Finding the Fourth Proportional to 18,735.96, 28,106.99 and 8,750.69

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Solution

The fourth proportional to 18,735.96, 28,106.99 and 8,750.69 is: 13,127.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,735.96 : 28,106.99 = 8,750.69 : x
  2. Step 2: Convert to fraction form
    18,735.96/28,106.99 = 8,750.69/x
  3. Step 3: Cross multiply
    18,735.96x = 28,106.99 × 8,750.69
  4. Step 4: Simplify right side
    18,735.96x = 245,955,556.32
  5. Step 5: Solve for x
    x = 245,955,556.32/18,735.96
  6. Step 6: Final answer
    x = 13,127.46

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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.