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Finding the Fourth Proportional to 19,865,488.80, 29,798,233.20 and 7,100,407.20

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Solution

The fourth proportional to 19,865,488.80, 29,798,233.20 and 7,100,407.20 is: 10,650,610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,865,488.80 : 29,798,233.20 = 7,100,407.20 : x
  2. Step 2: Convert to fraction form
    19,865,488.80/29,798,233.20 = 7,100,407.20/x
  3. Step 3: Cross multiply
    19,865,488.80x = 29,798,233.20 × 7,100,407.20
  4. Step 4: Simplify right side
    19,865,488.80x = 211,579,589,560,559.03
  5. Step 5: Solve for x
    x = 211,579,589,560,559.03/19,865,488.80
  6. Step 6: Final answer
    x = 10,650,610.80

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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.