Home / 28,279.76-42,379.52-20,825.76

Finding the Fourth Proportional to 28,279.76, 42,379.52 and 20,825.76

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Solution

The fourth proportional to 28,279.76, 42,379.52 and 20,825.76 is: 31,209.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.76 : 42,379.52 = 20,825.76 : x
  2. Step 2: Convert to fraction form
    28,279.76/42,379.52 = 20,825.76/x
  3. Step 3: Cross multiply
    28,279.76x = 42,379.52 × 20,825.76
  4. Step 4: Simplify right side
    28,279.76x = 882,585,712.44
  5. Step 5: Solve for x
    x = 882,585,712.44/28,279.76
  6. Step 6: Final answer
    x = 31,209.09

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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.