Home / 20,907.72-28,851.48-11,475.54

Finding the Fourth Proportional to 20,907.72, 28,851.48 and 11,475.54

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Solution

The fourth proportional to 20,907.72, 28,851.48 and 11,475.54 is: 15,835.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.72 : 28,851.48 = 11,475.54 : x
  2. Step 2: Convert to fraction form
    20,907.72/28,851.48 = 11,475.54/x
  3. Step 3: Cross multiply
    20,907.72x = 28,851.48 × 11,475.54
  4. Step 4: Simplify right side
    20,907.72x = 331,086,312.80
  5. Step 5: Solve for x
    x = 331,086,312.80/20,907.72
  6. Step 6: Final answer
    x = 15,835.60

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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.