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Finding the Fourth Proportional to 12,479,402.80, 18,721,825.80 and 7,090,634.80

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Solution

The fourth proportional to 12,479,402.80, 18,721,825.80 and 7,090,634.80 is: 10,637,498.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479,402.80 : 18,721,825.80 = 7,090,634.80 : x
  2. Step 2: Convert to fraction form
    12,479,402.80/18,721,825.80 = 7,090,634.80/x
  3. Step 3: Cross multiply
    12,479,402.80x = 18,721,825.80 × 7,090,634.80
  4. Step 4: Simplify right side
    12,479,402.80x = 132,749,629,537,017.84
  5. Step 5: Solve for x
    x = 132,749,629,537,017.84/12,479,402.80
  6. Step 6: Final answer
    x = 10,637,498.58

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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.