Home / 18,638.28-25,720.98-10,140.42

Finding the Fourth Proportional to 18,638.28, 25,720.98 and 10,140.42

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Solution

The fourth proportional to 18,638.28, 25,720.98 and 10,140.42 is: 13,993.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.28 : 25,720.98 = 10,140.42 : x
  2. Step 2: Convert to fraction form
    18,638.28/25,720.98 = 10,140.42/x
  3. Step 3: Cross multiply
    18,638.28x = 25,720.98 × 10,140.42
  4. Step 4: Simplify right side
    18,638.28x = 260,821,540.01
  5. Step 5: Solve for x
    x = 260,821,540.01/18,638.28
  6. Step 6: Final answer
    x = 13,993.86

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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.