Home / 20,478,887.20-30,718,330.80-18,919,993.60

Finding the Fourth Proportional to 20,478,887.20, 30,718,330.80 and 18,919,993.60

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Solution

The fourth proportional to 20,478,887.20, 30,718,330.80 and 18,919,993.60 is: 28,379,990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478,887.20 : 30,718,330.80 = 18,919,993.60 : x
  2. Step 2: Convert to fraction form
    20,478,887.20/30,718,330.80 = 18,919,993.60/x
  3. Step 3: Cross multiply
    20,478,887.20x = 30,718,330.80 × 18,919,993.60
  4. Step 4: Simplify right side
    20,478,887.20x = 581,190,622,138,683
  5. Step 5: Solve for x
    x = 581,190,622,138,683/20,478,887.20
  6. Step 6: Final answer
    x = 28,379,990.40

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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.