Home / 28,135.56-42,203.34-12,118.53

Finding the Fourth Proportional to 28,135.56, 42,203.34 and 12,118.53

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Solution

The fourth proportional to 28,135.56, 42,203.34 and 12,118.53 is: 18,177.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.56 : 42,203.34 = 12,118.53 : x
  2. Step 2: Convert to fraction form
    28,135.56/42,203.34 = 12,118.53/x
  3. Step 3: Cross multiply
    28,135.56x = 42,203.34 × 12,118.53
  4. Step 4: Simplify right side
    28,135.56x = 511,442,441.89
  5. Step 5: Solve for x
    x = 511,442,441.89/28,135.56
  6. Step 6: Final answer
    x = 18,177.80

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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.