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Finding the Fourth Proportional to 18,678,660.60, 28,008,659.70 and 8,569,860.60

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Solution

The fourth proportional to 18,678,660.60, 28,008,659.70 and 8,569,860.60 is: 12,850,509.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678,660.60 : 28,008,659.70 = 8,569,860.60 : x
  2. Step 2: Convert to fraction form
    18,678,660.60/28,008,659.70 = 8,569,860.60/x
  3. Step 3: Cross multiply
    18,678,660.60x = 28,008,659.70 × 8,569,860.60
  4. Step 4: Simplify right side
    18,678,660.60x = 240,030,309,221,837.81
  5. Step 5: Solve for x
    x = 240,030,309,221,837.81/18,678,660.60
  6. Step 6: Final answer
    x = 12,850,509.70

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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.