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Finding the Fourth Proportional to 19,879,398.40, 29,819,097.60 and 12,713,036.80

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Solution

The fourth proportional to 19,879,398.40, 29,819,097.60 and 12,713,036.80 is: 19,069,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879,398.40 : 29,819,097.60 = 12,713,036.80 : x
  2. Step 2: Convert to fraction form
    19,879,398.40/29,819,097.60 = 12,713,036.80/x
  3. Step 3: Cross multiply
    19,879,398.40x = 29,819,097.60 × 12,713,036.80
  4. Step 4: Simplify right side
    19,879,398.40x = 379,091,285,131,591.75
  5. Step 5: Solve for x
    x = 379,091,285,131,591.75/19,879,398.40
  6. Step 6: Final answer
    x = 19,069,555.20

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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.