Home / 12,128,520.30-18,192,780.45-8,939,874.30

Finding the Fourth Proportional to 12,128,520.30, 18,192,780.45 and 8,939,874.30

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Solution

The fourth proportional to 12,128,520.30, 18,192,780.45 and 8,939,874.30 is: 13,409,811.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,520.30 : 18,192,780.45 = 8,939,874.30 : x
  2. Step 2: Convert to fraction form
    12,128,520.30/18,192,780.45 = 8,939,874.30/x
  3. Step 3: Cross multiply
    12,128,520.30x = 18,192,780.45 × 8,939,874.30
  4. Step 4: Simplify right side
    12,128,520.30x = 162,641,170,390,497.44
  5. Step 5: Solve for x
    x = 162,641,170,390,497.44/12,128,520.30
  6. Step 6: Final answer
    x = 13,409,811.45

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Double scale
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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.