Home / 20,621,728.70-28,458,003.10-11,329,316.74

Finding the Fourth Proportional to 20,621,728.70, 28,458,003.10 and 11,329,316.74

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Solution

The fourth proportional to 20,621,728.70, 28,458,003.10 and 11,329,316.74 is: 15,634,466.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621,728.70 : 28,458,003.10 = 11,329,316.74 : x
  2. Step 2: Convert to fraction form
    20,621,728.70/28,458,003.10 = 11,329,316.74/x
  3. Step 3: Cross multiply
    20,621,728.70x = 28,458,003.10 × 11,329,316.74
  4. Step 4: Simplify right side
    20,621,728.70x = 322,409,730,907,801.94
  5. Step 5: Solve for x
    x = 322,409,730,907,801.94/20,621,728.70
  6. Step 6: Final answer
    x = 15,634,466.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.