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Finding the Fourth Proportional to 18,848,692.80, 28,264,744.80 and 7,485,364.80

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Solution

The fourth proportional to 18,848,692.80, 28,264,744.80 and 7,485,364.80 is: 11,224,753.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,848,692.80 : 28,264,744.80 = 7,485,364.80 : x
  2. Step 2: Convert to fraction form
    18,848,692.80/28,264,744.80 = 7,485,364.80/x
  3. Step 3: Cross multiply
    18,848,692.80x = 28,264,744.80 × 7,485,364.80
  4. Step 4: Simplify right side
    18,848,692.80x = 211,571,925,806,903.03
  5. Step 5: Solve for x
    x = 211,571,925,806,903.03/18,848,692.80
  6. Step 6: Final answer
    x = 11,224,753.25

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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.