Home / 19,138.91-26,408.50-10,640.79

Finding the Fourth Proportional to 19,138.91, 26,408.50 and 10,640.79

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Solution

The fourth proportional to 19,138.91, 26,408.50 and 10,640.79 is: 14,682.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.91 : 26,408.50 = 10,640.79 : x
  2. Step 2: Convert to fraction form
    19,138.91/26,408.50 = 10,640.79/x
  3. Step 3: Cross multiply
    19,138.91x = 26,408.50 × 10,640.79
  4. Step 4: Simplify right side
    19,138.91x = 281,007,302.72
  5. Step 5: Solve for x
    x = 281,007,302.72/19,138.91
  6. Step 6: Final answer
    x = 14,682.51

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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.