Home / 12,928.64-19,397.84-5,142.96

Finding the Fourth Proportional to 12,928.64, 19,397.84 and 5,142.96

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Solution

The fourth proportional to 12,928.64, 19,397.84 and 5,142.96 is: 7,716.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.64 : 19,397.84 = 5,142.96 : x
  2. Step 2: Convert to fraction form
    12,928.64/19,397.84 = 5,142.96/x
  3. Step 3: Cross multiply
    12,928.64x = 19,397.84 × 5,142.96
  4. Step 4: Simplify right side
    12,928.64x = 99,762,315.21
  5. Step 5: Solve for x
    x = 99,762,315.21/12,928.64
  6. Step 6: Final answer
    x = 7,716.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.