Home / 18,638.10-25,736.13-12,378.42

Finding the Fourth Proportional to 18,638.10, 25,736.13 and 12,378.42

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Solution

The fourth proportional to 18,638.10, 25,736.13 and 12,378.42 is: 17,092.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.10 : 25,736.13 = 12,378.42 : x
  2. Step 2: Convert to fraction form
    18,638.10/25,736.13 = 12,378.42/x
  3. Step 3: Cross multiply
    18,638.10x = 25,736.13 × 12,378.42
  4. Step 4: Simplify right side
    18,638.10x = 318,572,626.31
  5. Step 5: Solve for x
    x = 318,572,626.31/18,638.10
  6. Step 6: Final answer
    x = 17,092.55

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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.