Home / 20,478,886.20-30,718,329.30-18,919,992.60

Finding the Fourth Proportional to 20,478,886.20, 30,718,329.30 and 18,919,992.60

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Solution

The fourth proportional to 20,478,886.20, 30,718,329.30 and 18,919,992.60 is: 28,379,988.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478,886.20 : 30,718,329.30 = 18,919,992.60 : x
  2. Step 2: Convert to fraction form
    20,478,886.20/30,718,329.30 = 18,919,992.60/x
  3. Step 3: Cross multiply
    20,478,886.20x = 30,718,329.30 × 18,919,992.60
  4. Step 4: Simplify right side
    20,478,886.20x = 581,190,563,040,363.25
  5. Step 5: Solve for x
    x = 581,190,563,040,363.25/20,478,886.20
  6. Step 6: Final answer
    x = 28,379,988.90

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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.