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Finding the Fourth Proportional to 28,017,318.40, 41,993,318.40 and 12,872,780.80

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Solution

The fourth proportional to 28,017,318.40, 41,993,318.40 and 12,872,780.80 is: 19,294,165.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,017,318.40 : 41,993,318.40 = 12,872,780.80 : x
  2. Step 2: Convert to fraction form
    28,017,318.40/41,993,318.40 = 12,872,780.80/x
  3. Step 3: Cross multiply
    28,017,318.40x = 41,993,318.40 × 12,872,780.80
  4. Step 4: Simplify right side
    28,017,318.40x = 540,570,782,827,806.75
  5. Step 5: Solve for x
    x = 540,570,782,827,806.75/28,017,318.40
  6. Step 6: Final answer
    x = 19,294,165.67

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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.