Home / 12,938,728.80-19,408,093.20-12,686,786.40

Finding the Fourth Proportional to 12,938,728.80, 19,408,093.20 and 12,686,786.40

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Solution

The fourth proportional to 12,938,728.80, 19,408,093.20 and 12,686,786.40 is: 19,030,179.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938,728.80 : 19,408,093.20 = 12,686,786.40 : x
  2. Step 2: Convert to fraction form
    12,938,728.80/19,408,093.20 = 12,686,786.40/x
  3. Step 3: Cross multiply
    12,938,728.80x = 19,408,093.20 × 12,686,786.40
  4. Step 4: Simplify right side
    12,938,728.80x = 246,226,332,859,692.47
  5. Step 5: Solve for x
    x = 246,226,332,859,692.47/12,938,728.80
  6. Step 6: Final answer
    x = 19,030,179.60

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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.