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Finding the Fourth Proportional to 12,846,492.80, 19,269,739.20 and 3,390,876.80

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Solution

The fourth proportional to 12,846,492.80, 19,269,739.20 and 3,390,876.80 is: 5,086,315.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,846,492.80 : 19,269,739.20 = 3,390,876.80 : x
  2. Step 2: Convert to fraction form
    12,846,492.80/19,269,739.20 = 3,390,876.80/x
  3. Step 3: Cross multiply
    12,846,492.80x = 19,269,739.20 × 3,390,876.80
  4. Step 4: Simplify right side
    12,846,492.80x = 65,341,311,595,330.55
  5. Step 5: Solve for x
    x = 65,341,311,595,330.55/12,846,492.80
  6. Step 6: Final answer
    x = 5,086,315.20

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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.