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Finding the Fourth Proportional to 5,493.76, 7,581.28 and 3,136.16

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Solution

The fourth proportional to 5,493.76, 7,581.28 and 3,136.16 is: 4,327.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,493.76 : 7,581.28 = 3,136.16 : x
  2. Step 2: Convert to fraction form
    5,493.76/7,581.28 = 3,136.16/x
  3. Step 3: Cross multiply
    5,493.76x = 7,581.28 × 3,136.16
  4. Step 4: Simplify right side
    5,493.76x = 23,776,107.08
  5. Step 5: Solve for x
    x = 23,776,107.08/5,493.76
  6. Step 6: Final answer
    x = 4,327.84

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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.