Home / 12,939.15-19,408.79-5,153.43

Finding the Fourth Proportional to 12,939.15, 19,408.79 and 5,153.43

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Solution

The fourth proportional to 12,939.15, 19,408.79 and 5,153.43 is: 7,730.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.15 : 19,408.79 = 5,153.43 : x
  2. Step 2: Convert to fraction form
    12,939.15/19,408.79 = 5,153.43/x
  3. Step 3: Cross multiply
    12,939.15x = 19,408.79 × 5,153.43
  4. Step 4: Simplify right side
    12,939.15x = 100,021,780.75
  5. Step 5: Solve for x
    x = 100,021,780.75/12,939.15
  6. Step 6: Final answer
    x = 7,730.17

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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.