Home / 21,338.55-29,442.48-12,380.86

Finding the Fourth Proportional to 21,338.55, 29,442.48 and 12,380.86

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Solution

The fourth proportional to 21,338.55, 29,442.48 and 12,380.86 is: 17,082.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,338.55 : 29,442.48 = 12,380.86 : x
  2. Step 2: Convert to fraction form
    21,338.55/29,442.48 = 12,380.86/x
  3. Step 3: Cross multiply
    21,338.55x = 29,442.48 × 12,380.86
  4. Step 4: Simplify right side
    21,338.55x = 364,523,222.93
  5. Step 5: Solve for x
    x = 364,523,222.93/21,338.55
  6. Step 6: Final answer
    x = 17,082.85

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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.