Home / 5,128.52-7,080.62-3,240.81

Finding the Fourth Proportional to 5,128.52, 7,080.62 and 3,240.81

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Solution

The fourth proportional to 5,128.52, 7,080.62 and 3,240.81 is: 4,474.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.52 : 7,080.62 = 3,240.81 : x
  2. Step 2: Convert to fraction form
    5,128.52/7,080.62 = 3,240.81/x
  3. Step 3: Cross multiply
    5,128.52x = 7,080.62 × 3,240.81
  4. Step 4: Simplify right side
    5,128.52x = 22,946,927.90
  5. Step 5: Solve for x
    x = 22,946,927.90/5,128.52
  6. Step 6: Final answer
    x = 4,474.38

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Half scale
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Double scale
Find fourth proportional to 5,129.52, 7,082 and 3,241.81
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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.