Home / 20,190,128.60-30,285,192.90-7,408,972.55

Finding the Fourth Proportional to 20,190,128.60, 30,285,192.90 and 7,408,972.55

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Solution

The fourth proportional to 20,190,128.60, 30,285,192.90 and 7,408,972.55 is: 11,113,458.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190,128.60 : 30,285,192.90 = 7,408,972.55 : x
  2. Step 2: Convert to fraction form
    20,190,128.60/30,285,192.90 = 7,408,972.55/x
  3. Step 3: Cross multiply
    20,190,128.60x = 30,285,192.90 × 7,408,972.55
  4. Step 4: Simplify right side
    20,190,128.60x = 224,382,162,867,554.88
  5. Step 5: Solve for x
    x = 224,382,162,867,554.88/20,190,128.60
  6. Step 6: Final answer
    x = 11,113,458.83

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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.