Home / 12,778.21-19,153.14-5,380.48

Finding the Fourth Proportional to 12,778.21, 19,153.14 and 5,380.48

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Solution

The fourth proportional to 12,778.21, 19,153.14 and 5,380.48 is: 8,064.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,778.21 : 19,153.14 = 5,380.48 : x
  2. Step 2: Convert to fraction form
    12,778.21/19,153.14 = 5,380.48/x
  3. Step 3: Cross multiply
    12,778.21x = 19,153.14 × 5,380.48
  4. Step 4: Simplify right side
    12,778.21x = 103,053,086.71
  5. Step 5: Solve for x
    x = 103,053,086.71/12,778.21
  6. Step 6: Final answer
    x = 8,064.75

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1.5x scale

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.