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Finding the Fourth Proportional to 19,318,718.40, 28,978,077.60 and 13,650,014.40

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Solution

The fourth proportional to 19,318,718.40, 28,978,077.60 and 13,650,014.40 is: 20,475,021.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,318,718.40 : 28,978,077.60 = 13,650,014.40 : x
  2. Step 2: Convert to fraction form
    19,318,718.40/28,978,077.60 = 13,650,014.40/x
  3. Step 3: Cross multiply
    19,318,718.40x = 28,978,077.60 × 13,650,014.40
  4. Step 4: Simplify right side
    19,318,718.40x = 395,551,176,524,317.50
  5. Step 5: Solve for x
    x = 395,551,176,524,317.50/19,318,718.40
  6. Step 6: Final answer
    x = 20,475,021.60

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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.