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Finding the Fourth Proportional to 18,815.40, 28,223.10 and 17,794.80

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Solution

The fourth proportional to 18,815.40, 28,223.10 and 17,794.80 is: 26,692.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.40 : 28,223.10 = 17,794.80 : x
  2. Step 2: Convert to fraction form
    18,815.40/28,223.10 = 17,794.80/x
  3. Step 3: Cross multiply
    18,815.40x = 28,223.10 × 17,794.80
  4. Step 4: Simplify right side
    18,815.40x = 502,224,419.88
  5. Step 5: Solve for x
    x = 502,224,419.88/18,815.40
  6. Step 6: Final answer
    x = 26,692.20

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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.