Home / 30,539.72-45,731.82-20,119.88

Finding the Fourth Proportional to 30,539.72, 45,731.82 and 20,119.88

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Solution

The fourth proportional to 30,539.72, 45,731.82 and 20,119.88 is: 30,128.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,539.72 : 45,731.82 = 20,119.88 : x
  2. Step 2: Convert to fraction form
    30,539.72/45,731.82 = 20,119.88/x
  3. Step 3: Cross multiply
    30,539.72x = 45,731.82 × 20,119.88
  4. Step 4: Simplify right side
    30,539.72x = 920,118,730.58
  5. Step 5: Solve for x
    x = 920,118,730.58/30,539.72
  6. Step 6: Final answer
    x = 30,128.59

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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.