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Finding the Fourth Proportional to 18,879,114.90, 28,333,417.95 and 8,782,986.90

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Solution

The fourth proportional to 18,879,114.90, 28,333,417.95 and 8,782,986.90 is: 13,181,340.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,879,114.90 : 28,333,417.95 = 8,782,986.90 : x
  2. Step 2: Convert to fraction form
    18,879,114.90/28,333,417.95 = 8,782,986.90/x
  3. Step 3: Cross multiply
    18,879,114.90x = 28,333,417.95 × 8,782,986.90
  4. Step 4: Simplify right side
    18,879,114.90x = 248,852,038,687,074.84
  5. Step 5: Solve for x
    x = 248,852,038,687,074.84/18,879,114.90
  6. Step 6: Final answer
    x = 13,181,340.33

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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.