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Finding the Fourth Proportional to 19,164,873.60, 28,747,310.40 and 12,362,428.80

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Solution

The fourth proportional to 19,164,873.60, 28,747,310.40 and 12,362,428.80 is: 18,543,643.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,164,873.60 : 28,747,310.40 = 12,362,428.80 : x
  2. Step 2: Convert to fraction form
    19,164,873.60/28,747,310.40 = 12,362,428.80/x
  3. Step 3: Cross multiply
    19,164,873.60x = 28,747,310.40 × 12,362,428.80
  4. Step 4: Simplify right side
    19,164,873.60x = 355,386,578,011,499.50
  5. Step 5: Solve for x
    x = 355,386,578,011,499.50/19,164,873.60
  6. Step 6: Final answer
    x = 18,543,643.20

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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.