Home / 28,311.70-42,427.25-20,857.54

Finding the Fourth Proportional to 28,311.70, 42,427.25 and 20,857.54

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Solution

The fourth proportional to 28,311.70, 42,427.25 and 20,857.54 is: 31,256.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,311.70 : 42,427.25 = 20,857.54 : x
  2. Step 2: Convert to fraction form
    28,311.70/42,427.25 = 20,857.54/x
  3. Step 3: Cross multiply
    28,311.70x = 42,427.25 × 20,857.54
  4. Step 4: Simplify right side
    28,311.70x = 884,927,959.68
  5. Step 5: Solve for x
    x = 884,927,959.68/28,311.70
  6. Step 6: Final answer
    x = 31,256.62

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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.