Home / 20,418,415.20-30,627,622.80-12,860,143.20

Finding the Fourth Proportional to 20,418,415.20, 30,627,622.80 and 12,860,143.20

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Solution

The fourth proportional to 20,418,415.20, 30,627,622.80 and 12,860,143.20 is: 19,290,214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418,415.20 : 30,627,622.80 = 12,860,143.20 : x
  2. Step 2: Convert to fraction form
    20,418,415.20/30,627,622.80 = 12,860,143.20/x
  3. Step 3: Cross multiply
    20,418,415.20x = 30,627,622.80 × 12,860,143.20
  4. Step 4: Simplify right side
    20,418,415.20x = 393,875,615,083,584.94
  5. Step 5: Solve for x
    x = 393,875,615,083,584.94/20,418,415.20
  6. Step 6: Final answer
    x = 19,290,214.80

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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.