Home / 12,771,618.40-19,171,424.40-7,984,712.80

Finding the Fourth Proportional to 12,771,618.40, 19,171,424.40 and 7,984,712.80

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Solution

The fourth proportional to 12,771,618.40, 19,171,424.40 and 7,984,712.80 is: 11,985,819.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,771,618.40 : 19,171,424.40 = 7,984,712.80 : x
  2. Step 2: Convert to fraction form
    12,771,618.40/19,171,424.40 = 7,984,712.80/x
  3. Step 3: Cross multiply
    12,771,618.40x = 19,171,424.40 × 7,984,712.80
  4. Step 4: Simplify right side
    12,771,618.40x = 153,078,317,800,912.31
  5. Step 5: Solve for x
    x = 153,078,317,800,912.31/12,771,618.40
  6. Step 6: Final answer
    x = 11,985,819.89

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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.