Home / 8,081.12-11,129.24-6,670.50

Finding the Fourth Proportional to 8,081.12, 11,129.24 and 6,670.50

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Solution

The fourth proportional to 8,081.12, 11,129.24 and 6,670.50 is: 9,186.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.12 : 11,129.24 = 6,670.50 : x
  2. Step 2: Convert to fraction form
    8,081.12/11,129.24 = 6,670.50/x
  3. Step 3: Cross multiply
    8,081.12x = 11,129.24 × 6,670.50
  4. Step 4: Simplify right side
    8,081.12x = 74,237,562.07
  5. Step 5: Solve for x
    x = 74,237,562.07/8,081.12
  6. Step 6: Final answer
    x = 9,186.55

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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.