Home / 20,781,414,819.90-28,678,578,176.24-12,208,202,803.69

Finding the Fourth Proportional to 20,781,414,819.90, 28,678,578,176.24 and 12,208,202,803.69

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Solution

The fourth proportional to 20,781,414,819.90, 28,678,578,176.24 and 12,208,202,803.69 is: 16,847,452,472.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781,414,819.90 : 28,678,578,176.24 = 12,208,202,803.69 : x
  2. Step 2: Convert to fraction form
    20,781,414,819.90/28,678,578,176.24 = 12,208,202,803.69/x
  3. Step 3: Cross multiply
    20,781,414,819.90x = 28,678,578,176.24 × 12,208,202,803.69
  4. Step 4: Simplify right side
    20,781,414,819.90x = 350,113,898,497,016,070,144
  5. Step 5: Solve for x
    x = 350,113,898,497,016,070,144/20,781,414,819.90
  6. Step 6: Final answer
    x = 16,847,452,472.86

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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.