Home / 20,729-28,606.79-11,778.02

Finding the Fourth Proportional to 20,729, 28,606.79 and 11,778.02

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Solution

The fourth proportional to 20,729, 28,606.79 and 11,778.02 is: 16,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729 : 28,606.79 = 11,778.02 : x
  2. Step 2: Convert to fraction form
    20,729/28,606.79 = 11,778.02/x
  3. Step 3: Cross multiply
    20,729x = 28,606.79 × 11,778.02
  4. Step 4: Simplify right side
    20,729x = 336,931,338.44
  5. Step 5: Solve for x
    x = 336,931,338.44/20,729
  6. Step 6: Final answer
    x = 16,254.10

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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.