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Finding the Fourth Proportional to 8,938,728.90, 13,408,093.35 and 8,300,999.70

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Solution

The fourth proportional to 8,938,728.90, 13,408,093.35 and 8,300,999.70 is: 12,451,499.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,938,728.90 : 13,408,093.35 = 8,300,999.70 : x
  2. Step 2: Convert to fraction form
    8,938,728.90/13,408,093.35 = 8,300,999.70/x
  3. Step 3: Cross multiply
    8,938,728.90x = 13,408,093.35 × 8,300,999.70
  4. Step 4: Simplify right side
    8,938,728.90x = 111,300,578,875,922
  5. Step 5: Solve for x
    x = 111,300,578,875,922/8,938,728.90
  6. Step 6: Final answer
    x = 12,451,499.55

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Similar ratio
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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.