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Finding the Fourth Proportional to 12,672,213.80, 19,008,147.90 and 4,152,828.20

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Solution

The fourth proportional to 12,672,213.80, 19,008,147.90 and 4,152,828.20 is: 6,229,185.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,672,213.80 : 19,008,147.90 = 4,152,828.20 : x
  2. Step 2: Convert to fraction form
    12,672,213.80/19,008,147.90 = 4,152,828.20/x
  3. Step 3: Cross multiply
    12,672,213.80x = 19,008,147.90 × 4,152,828.20
  4. Step 4: Simplify right side
    12,672,213.80x = 78,937,572,628,890.78
  5. Step 5: Solve for x
    x = 78,937,572,628,890.78/12,672,213.80
  6. Step 6: Final answer
    x = 6,229,185.67

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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.