Home / 20,280.51-30,420.93-5,489.55

Finding the Fourth Proportional to 20,280.51, 30,420.93 and 5,489.55

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Solution

The fourth proportional to 20,280.51, 30,420.93 and 5,489.55 is: 8,234.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.51 : 30,420.93 = 5,489.55 : x
  2. Step 2: Convert to fraction form
    20,280.51/30,420.93 = 5,489.55/x
  3. Step 3: Cross multiply
    20,280.51x = 30,420.93 × 5,489.55
  4. Step 4: Simplify right side
    20,280.51x = 166,997,216.28
  5. Step 5: Solve for x
    x = 166,997,216.28/20,280.51
  6. Step 6: Final answer
    x = 8,234.37

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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.