Home / 7,980.21-11,012.54-4,997.70

Finding the Fourth Proportional to 7,980.21, 11,012.54 and 4,997.70

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Solution

The fourth proportional to 7,980.21, 11,012.54 and 4,997.70 is: 6,896.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980.21 : 11,012.54 = 4,997.70 : x
  2. Step 2: Convert to fraction form
    7,980.21/11,012.54 = 4,997.70/x
  3. Step 3: Cross multiply
    7,980.21x = 11,012.54 × 4,997.70
  4. Step 4: Simplify right side
    7,980.21x = 55,037,346.17
  5. Step 5: Solve for x
    x = 55,037,346.17/7,980.21
  6. Step 6: Final answer
    x = 6,896.73

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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.