Home / 28,156.83-38,861.82-20,112.32

Finding the Fourth Proportional to 28,156.83, 38,861.82 and 20,112.32

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Solution

The fourth proportional to 28,156.83, 38,861.82 and 20,112.32 is: 27,758.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,156.83 : 38,861.82 = 20,112.32 : x
  2. Step 2: Convert to fraction form
    28,156.83/38,861.82 = 20,112.32/x
  3. Step 3: Cross multiply
    28,156.83x = 38,861.82 × 20,112.32
  4. Step 4: Simplify right side
    28,156.83x = 781,601,165.31
  5. Step 5: Solve for x
    x = 781,601,165.31/28,156.83
  6. Step 6: Final answer
    x = 27,758.85

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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.