Home / 18,515.56-25,551.78-13,219.38

Finding the Fourth Proportional to 18,515.56, 25,551.78 and 13,219.38

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Solution

The fourth proportional to 18,515.56, 25,551.78 and 13,219.38 is: 18,242.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.56 : 25,551.78 = 13,219.38 : x
  2. Step 2: Convert to fraction form
    18,515.56/25,551.78 = 13,219.38/x
  3. Step 3: Cross multiply
    18,515.56x = 25,551.78 × 13,219.38
  4. Step 4: Simplify right side
    18,515.56x = 337,778,689.50
  5. Step 5: Solve for x
    x = 337,778,689.50/18,515.56
  6. Step 6: Final answer
    x = 18,242.96

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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.