Home / 30,989.62-42,765.42-16,842.55

Finding the Fourth Proportional to 30,989.62, 42,765.42 and 16,842.55

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Solution

The fourth proportional to 30,989.62, 42,765.42 and 16,842.55 is: 23,242.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,989.62 : 42,765.42 = 16,842.55 : x
  2. Step 2: Convert to fraction form
    30,989.62/42,765.42 = 16,842.55/x
  3. Step 3: Cross multiply
    30,989.62x = 42,765.42 × 16,842.55
  4. Step 4: Simplify right side
    30,989.62x = 720,278,724.62
  5. Step 5: Solve for x
    x = 720,278,724.62/30,989.62
  6. Step 6: Final answer
    x = 23,242.58

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1.5x scale

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.