Home / 8,131.24-11,215.38-4,989.16

Finding the Fourth Proportional to 8,131.24, 11,215.38 and 4,989.16

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Solution

The fourth proportional to 8,131.24, 11,215.38 and 4,989.16 is: 6,881.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,131.24 : 11,215.38 = 4,989.16 : x
  2. Step 2: Convert to fraction form
    8,131.24/11,215.38 = 4,989.16/x
  3. Step 3: Cross multiply
    8,131.24x = 11,215.38 × 4,989.16
  4. Step 4: Simplify right side
    8,131.24x = 55,955,325.28
  5. Step 5: Solve for x
    x = 55,955,325.28/8,131.24
  6. Step 6: Final answer
    x = 6,881.52

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Half scale
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Double scale
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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.