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Finding the Fourth Proportional to 18,679,260.20, 28,018,890.30 and 6,562,405.40

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Solution

The fourth proportional to 18,679,260.20, 28,018,890.30 and 6,562,405.40 is: 9,843,608.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679,260.20 : 28,018,890.30 = 6,562,405.40 : x
  2. Step 2: Convert to fraction form
    18,679,260.20/28,018,890.30 = 6,562,405.40/x
  3. Step 3: Cross multiply
    18,679,260.20x = 28,018,890.30 × 6,562,405.40
  4. Step 4: Simplify right side
    18,679,260.20x = 183,871,317,006,727.62
  5. Step 5: Solve for x
    x = 183,871,317,006,727.62/18,679,260.20
  6. Step 6: Final answer
    x = 9,843,608.10

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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.