Home / 28,135.11-38,825.00-15,385.82

Finding the Fourth Proportional to 28,135.11, 38,825.00 and 15,385.82

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Solution

The fourth proportional to 28,135.11, 38,825.00 and 15,385.82 is: 21,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,135.11 : 38,825.00 = 15,385.82 : x
  2. Step 2: Convert to fraction form
    28,135.11/38,825.00 = 15,385.82/x
  3. Step 3: Cross multiply
    28,135.11x = 38,825.00 × 15,385.82
  4. Step 4: Simplify right side
    28,135.11x = 597,354,305.84
  5. Step 5: Solve for x
    x = 597,354,305.84/28,135.11
  6. Step 6: Final answer
    x = 21,231.63

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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.