Home / 12,481,420.80-18,684,806.40-7,430,131.20

Finding the Fourth Proportional to 12,481,420.80, 18,684,806.40 and 7,430,131.20

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Solution

The fourth proportional to 12,481,420.80, 18,684,806.40 and 7,430,131.20 is: 11,122,977.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,481,420.80 : 18,684,806.40 = 7,430,131.20 : x
  2. Step 2: Convert to fraction form
    12,481,420.80/18,684,806.40 = 7,430,131.20/x
  3. Step 3: Cross multiply
    12,481,420.80x = 18,684,806.40 × 7,430,131.20
  4. Step 4: Simplify right side
    12,481,420.80x = 138,830,562,998,599.67
  5. Step 5: Solve for x
    x = 138,830,562,998,599.67/12,481,420.80
  6. Step 6: Final answer
    x = 11,122,977.52

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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.