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Finding the Fourth Proportional to 5,486.76, 7,571.28 and 3,128.46

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Solution

The fourth proportional to 5,486.76, 7,571.28 and 3,128.46 is: 4,317.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,486.76 : 7,571.28 = 3,128.46 : x
  2. Step 2: Convert to fraction form
    5,486.76/7,571.28 = 3,128.46/x
  3. Step 3: Cross multiply
    5,486.76x = 7,571.28 × 3,128.46
  4. Step 4: Simplify right side
    5,486.76x = 23,686,446.63
  5. Step 5: Solve for x
    x = 23,686,446.63/5,486.76
  6. Step 6: Final answer
    x = 4,317.02

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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.