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Finding the Fourth Proportional to 20,219,136.90, 30,328,705.35 and 20,219,136.90

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Solution

The fourth proportional to 20,219,136.90, 30,328,705.35 and 20,219,136.90 is: 30,328,705.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,219,136.90 : 30,328,705.35 = 20,219,136.90 : x
  2. Step 2: Convert to fraction form
    20,219,136.90/30,328,705.35 = 20,219,136.90/x
  3. Step 3: Cross multiply
    20,219,136.90x = 30,328,705.35 × 20,219,136.90
  4. Step 4: Simplify right side
    20,219,136.90x = 613,220,245,471,412.38
  5. Step 5: Solve for x
    x = 613,220,245,471,412.38/20,219,136.90
  6. Step 6: Final answer
    x = 30,328,705.35

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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.