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Finding the Fourth Proportional to 20,698.35, 28,377.35 and 20,325.30

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Solution

The fourth proportional to 20,698.35, 28,377.35 and 20,325.30 is: 27,865.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.35 : 28,377.35 = 20,325.30 : x
  2. Step 2: Convert to fraction form
    20,698.35/28,377.35 = 20,325.30/x
  3. Step 3: Cross multiply
    20,698.35x = 28,377.35 × 20,325.30
  4. Step 4: Simplify right side
    20,698.35x = 576,778,050.33
  5. Step 5: Solve for x
    x = 576,778,050.33/20,698.35
  6. Step 6: Final answer
    x = 27,865.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.