Home / 42,486.26-63,728.31-11,321.42

Finding the Fourth Proportional to 42,486.26, 63,728.31 and 11,321.42

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Solution

The fourth proportional to 42,486.26, 63,728.31 and 11,321.42 is: 16,981.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,486.26 : 63,728.31 = 11,321.42 : x
  2. Step 2: Convert to fraction form
    42,486.26/63,728.31 = 11,321.42/x
  3. Step 3: Cross multiply
    42,486.26x = 63,728.31 × 11,321.42
  4. Step 4: Simplify right side
    42,486.26x = 721,494,963.40
  5. Step 5: Solve for x
    x = 721,494,963.40/42,486.26
  6. Step 6: Final answer
    x = 16,981.84

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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.