Home / 8,320.56-11,462.30-7,121.72

Finding the Fourth Proportional to 8,320.56, 11,462.30 and 7,121.72

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Solution

The fourth proportional to 8,320.56, 11,462.30 and 7,121.72 is: 9,810.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.56 : 11,462.30 = 7,121.72 : x
  2. Step 2: Convert to fraction form
    8,320.56/11,462.30 = 7,121.72/x
  3. Step 3: Cross multiply
    8,320.56x = 11,462.30 × 7,121.72
  4. Step 4: Simplify right side
    8,320.56x = 81,631,291.16
  5. Step 5: Solve for x
    x = 81,631,291.16/8,320.56
  6. Step 6: Final answer
    x = 9,810.79

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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.