Home / 20,190,325.20-30,285,487.80-12,128,168.40

Finding the Fourth Proportional to 20,190,325.20, 30,285,487.80 and 12,128,168.40

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Solution

The fourth proportional to 20,190,325.20, 30,285,487.80 and 12,128,168.40 is: 18,192,252.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190,325.20 : 30,285,487.80 = 12,128,168.40 : x
  2. Step 2: Convert to fraction form
    20,190,325.20/30,285,487.80 = 12,128,168.40/x
  3. Step 3: Cross multiply
    20,190,325.20x = 30,285,487.80 × 12,128,168.40
  4. Step 4: Simplify right side
    20,190,325.20x = 367,307,496,114,545.56
  5. Step 5: Solve for x
    x = 367,307,496,114,545.56/20,190,325.20
  6. Step 6: Final answer
    x = 18,192,252.60

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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.