Home / 20,781,414,815.90-28,678,578,170.72-12,208,202,799.69

Finding the Fourth Proportional to 20,781,414,815.90, 28,678,578,170.72 and 12,208,202,799.69

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Solution

The fourth proportional to 20,781,414,815.90, 28,678,578,170.72 and 12,208,202,799.69 is: 16,847,452,467.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,414,815.90 : 28,678,578,170.72 = 12,208,202,799.69 : x
  2. Step 2: Convert to fraction form
    20,781,414,815.90/28,678,578,170.72 = 12,208,202,799.69/x
  3. Step 3: Cross multiply
    20,781,414,815.90x = 28,678,578,170.72 × 12,208,202,799.69
  4. Step 4: Simplify right side
    20,781,414,815.90x = 350,113,898,314,851,418,112
  5. Step 5: Solve for x
    x = 350,113,898,314,851,418,112/20,781,414,815.90
  6. Step 6: Final answer
    x = 16,847,452,467.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.