Home / 20,851.52-31,261.92-10,455.36

Finding the Fourth Proportional to 20,851.52, 31,261.92 and 10,455.36

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Solution

The fourth proportional to 20,851.52, 31,261.92 and 10,455.36 is: 15,675.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.52 : 31,261.92 = 10,455.36 : x
  2. Step 2: Convert to fraction form
    20,851.52/31,261.92 = 10,455.36/x
  3. Step 3: Cross multiply
    20,851.52x = 31,261.92 × 10,455.36
  4. Step 4: Simplify right side
    20,851.52x = 326,854,627.89
  5. Step 5: Solve for x
    x = 326,854,627.89/20,851.52
  6. Step 6: Final answer
    x = 15,675.34

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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.