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Finding the Fourth Proportional to 19,915,590.80, 29,804,573.40 and 11,943,136.40

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Solution

The fourth proportional to 19,915,590.80, 29,804,573.40 and 11,943,136.40 is: 17,873,438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,915,590.80 : 29,804,573.40 = 11,943,136.40 : x
  2. Step 2: Convert to fraction form
    19,915,590.80/29,804,573.40 = 11,943,136.40/x
  3. Step 3: Cross multiply
    19,915,590.80x = 29,804,573.40 × 11,943,136.40
  4. Step 4: Simplify right side
    19,915,590.80x = 355,960,085,460,011.75
  5. Step 5: Solve for x
    x = 355,960,085,460,011.75/19,915,590.80
  6. Step 6: Final answer
    x = 17,873,438.40

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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.