Home / 7,321.12-10,980.48-2,125.76

Finding the Fourth Proportional to 7,321.12, 10,980.48 and 2,125.76

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Solution

The fourth proportional to 7,321.12, 10,980.48 and 2,125.76 is: 3,188.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,321.12 : 10,980.48 = 2,125.76 : x
  2. Step 2: Convert to fraction form
    7,321.12/10,980.48 = 2,125.76/x
  3. Step 3: Cross multiply
    7,321.12x = 10,980.48 × 2,125.76
  4. Step 4: Simplify right side
    7,321.12x = 23,341,865.16
  5. Step 5: Solve for x
    x = 23,341,865.16/7,321.12
  6. Step 6: Final answer
    x = 3,188.29

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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.