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Finding the Fourth Proportional to 18,973,405.86, 28,471,443.60 and 17,429,763.40

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Solution

The fourth proportional to 18,973,405.86, 28,471,443.60 and 17,429,763.40 is: 26,155,057.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973,405.86 : 28,471,443.60 = 17,429,763.40 : x
  2. Step 2: Convert to fraction form
    18,973,405.86/28,471,443.60 = 17,429,763.40/x
  3. Step 3: Cross multiply
    18,973,405.86x = 28,471,443.60 × 17,429,763.40
  4. Step 4: Simplify right side
    18,973,405.86x = 496,250,525,604,444.25
  5. Step 5: Solve for x
    x = 496,250,525,604,444.25/18,973,405.86
  6. Step 6: Final answer
    x = 26,155,057.73

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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.