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Finding the Fourth Proportional to 18,907,730.76, 28,368,743.94 and 7,401,421.33

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Solution

The fourth proportional to 18,907,730.76, 28,368,743.94 and 7,401,421.33 is: 11,104,930.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,907,730.76 : 28,368,743.94 = 7,401,421.33 : x
  2. Step 2: Convert to fraction form
    18,907,730.76/28,368,743.94 = 7,401,421.33/x
  3. Step 3: Cross multiply
    18,907,730.76x = 28,368,743.94 × 7,401,421.33
  4. Step 4: Simplify right side
    18,907,730.76x = 209,969,026,502,824.25
  5. Step 5: Solve for x
    x = 209,969,026,502,824.25/18,907,730.76
  6. Step 6: Final answer
    x = 11,104,930.00

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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.