Home / 13,938.91-20,908.08-5,618.69

Finding the Fourth Proportional to 13,938.91, 20,908.08 and 5,618.69

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Solution

The fourth proportional to 13,938.91, 20,908.08 and 5,618.69 is: 8,427.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.91 : 20,908.08 = 5,618.69 : x
  2. Step 2: Convert to fraction form
    13,938.91/20,908.08 = 5,618.69/x
  3. Step 3: Cross multiply
    13,938.91x = 20,908.08 × 5,618.69
  4. Step 4: Simplify right side
    13,938.91x = 117,476,020.02
  5. Step 5: Solve for x
    x = 117,476,020.02/13,938.91
  6. Step 6: Final answer
    x = 8,427.92

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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.