Home / 5,279.60-7,285.55-2,889.12

Finding the Fourth Proportional to 5,279.60, 7,285.55 and 2,889.12

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Solution

The fourth proportional to 5,279.60, 7,285.55 and 2,889.12 is: 3,986.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,279.60 : 7,285.55 = 2,889.12 : x
  2. Step 2: Convert to fraction form
    5,279.60/7,285.55 = 2,889.12/x
  3. Step 3: Cross multiply
    5,279.60x = 7,285.55 × 2,889.12
  4. Step 4: Simplify right side
    5,279.60x = 21,048,800.11
  5. Step 5: Solve for x
    x = 21,048,800.11/5,279.60
  6. Step 6: Final answer
    x = 3,986.82

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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.