Home / 30,821.12-42,537.60-20,226.56

Finding the Fourth Proportional to 30,821.12, 42,537.60 and 20,226.56

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Solution

The fourth proportional to 30,821.12, 42,537.60 and 20,226.56 is: 27,915.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,821.12 : 42,537.60 = 20,226.56 : x
  2. Step 2: Convert to fraction form
    30,821.12/42,537.60 = 20,226.56/x
  3. Step 3: Cross multiply
    30,821.12x = 42,537.60 × 20,226.56
  4. Step 4: Simplify right side
    30,821.12x = 860,389,318.66
  5. Step 5: Solve for x
    x = 860,389,318.66/30,821.12
  6. Step 6: Final answer
    x = 27,915.58

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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.