Home / 20,975.83-28,946.09-11,415.90

Finding the Fourth Proportional to 20,975.83, 28,946.09 and 11,415.90

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Solution

The fourth proportional to 20,975.83, 28,946.09 and 11,415.90 is: 15,753.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.83 : 28,946.09 = 11,415.90 : x
  2. Step 2: Convert to fraction form
    20,975.83/28,946.09 = 11,415.90/x
  3. Step 3: Cross multiply
    20,975.83x = 28,946.09 × 11,415.90
  4. Step 4: Simplify right side
    20,975.83x = 330,445,697.37
  5. Step 5: Solve for x
    x = 330,445,697.37/20,975.83
  6. Step 6: Final answer
    x = 15,753.64

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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.