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Finding the Fourth Proportional to 18,702,914.90, 28,054,372.35 and 12,320,374.10

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Solution

The fourth proportional to 18,702,914.90, 28,054,372.35 and 12,320,374.10 is: 18,480,561.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702,914.90 : 28,054,372.35 = 12,320,374.10 : x
  2. Step 2: Convert to fraction form
    18,702,914.90/28,054,372.35 = 12,320,374.10/x
  3. Step 3: Cross multiply
    18,702,914.90x = 28,054,372.35 × 12,320,374.10
  4. Step 4: Simplify right side
    18,702,914.90x = 345,640,362,492,696.12
  5. Step 5: Solve for x
    x = 345,640,362,492,696.12/18,702,914.90
  6. Step 6: Final answer
    x = 18,480,561.15

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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.