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Finding the Fourth Proportional to 18,698.80, 28,048.20 and 18,266.80

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Solution

The fourth proportional to 18,698.80, 28,048.20 and 18,266.80 is: 27,400.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,698.80 : 28,048.20 = 18,266.80 : x
  2. Step 2: Convert to fraction form
    18,698.80/28,048.20 = 18,266.80/x
  3. Step 3: Cross multiply
    18,698.80x = 28,048.20 × 18,266.80
  4. Step 4: Simplify right side
    18,698.80x = 512,350,859.76
  5. Step 5: Solve for x
    x = 512,350,859.76/18,698.80
  6. Step 6: Final answer
    x = 27,400.20

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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.