Home / 8,128.91-11,219.36-5,261.18

Finding the Fourth Proportional to 8,128.91, 11,219.36 and 5,261.18

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Solution

The fourth proportional to 8,128.91, 11,219.36 and 5,261.18 is: 7,261.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,128.91 : 11,219.36 = 5,261.18 : x
  2. Step 2: Convert to fraction form
    8,128.91/11,219.36 = 5,261.18/x
  3. Step 3: Cross multiply
    8,128.91x = 11,219.36 × 5,261.18
  4. Step 4: Simplify right side
    8,128.91x = 59,026,990.04
  5. Step 5: Solve for x
    x = 59,026,990.04/8,128.91
  6. Step 6: Final answer
    x = 7,261.36

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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.