Home / 20,539.38-30,830.34-12,647.58

Finding the Fourth Proportional to 20,539.38, 30,830.34 and 12,647.58

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Solution

The fourth proportional to 20,539.38, 30,830.34 and 12,647.58 is: 18,984.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,539.38 : 30,830.34 = 12,647.58 : x
  2. Step 2: Convert to fraction form
    20,539.38/30,830.34 = 12,647.58/x
  3. Step 3: Cross multiply
    20,539.38x = 30,830.34 × 12,647.58
  4. Step 4: Simplify right side
    20,539.38x = 389,929,191.58
  5. Step 5: Solve for x
    x = 389,929,191.58/20,539.38
  6. Step 6: Final answer
    x = 18,984.47

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1.5x scale

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.