Home / 18,638.54-25,722.07-10,680.78

Finding the Fourth Proportional to 18,638.54, 25,722.07 and 10,680.78

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Solution

The fourth proportional to 18,638.54, 25,722.07 and 10,680.78 is: 14,739.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.54 : 25,722.07 = 10,680.78 : x
  2. Step 2: Convert to fraction form
    18,638.54/25,722.07 = 10,680.78/x
  3. Step 3: Cross multiply
    18,638.54x = 25,722.07 × 10,680.78
  4. Step 4: Simplify right side
    18,638.54x = 274,731,770.81
  5. Step 5: Solve for x
    x = 274,731,770.81/18,638.54
  6. Step 6: Final answer
    x = 14,739.99

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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.