Home / 8,279.20-11,420.40-5,133.12

Finding the Fourth Proportional to 8,279.20, 11,420.40 and 5,133.12

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Solution

The fourth proportional to 8,279.20, 11,420.40 and 5,133.12 is: 7,080.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,279.20 : 11,420.40 = 5,133.12 : x
  2. Step 2: Convert to fraction form
    8,279.20/11,420.40 = 5,133.12/x
  3. Step 3: Cross multiply
    8,279.20x = 11,420.40 × 5,133.12
  4. Step 4: Simplify right side
    8,279.20x = 58,622,283.65
  5. Step 5: Solve for x
    x = 58,622,283.65/8,279.20
  6. Step 6: Final answer
    x = 7,080.67

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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.