Home / 13,938.50-20,908.73-5,618.57

Finding the Fourth Proportional to 13,938.50, 20,908.73 and 5,618.57

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Solution

The fourth proportional to 13,938.50, 20,908.73 and 5,618.57 is: 8,428.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.50 : 20,908.73 = 5,618.57 : x
  2. Step 2: Convert to fraction form
    13,938.50/20,908.73 = 5,618.57/x
  3. Step 3: Cross multiply
    13,938.50x = 20,908.73 × 5,618.57
  4. Step 4: Simplify right side
    13,938.50x = 117,477,072.62
  5. Step 5: Solve for x
    x = 117,477,072.62/13,938.50
  6. Step 6: Final answer
    x = 8,428.25

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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.