Home / 18,638.10-25,720.38-10,140.48

Finding the Fourth Proportional to 18,638.10, 25,720.38 and 10,140.48

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Solution

The fourth proportional to 18,638.10, 25,720.38 and 10,140.48 is: 13,993.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,638.10 : 25,720.38 = 10,140.48 : x
  2. Step 2: Convert to fraction form
    18,638.10/25,720.38 = 10,140.48/x
  3. Step 3: Cross multiply
    18,638.10x = 25,720.38 × 10,140.48
  4. Step 4: Simplify right side
    18,638.10x = 260,816,998.98
  5. Step 5: Solve for x
    x = 260,816,998.98/18,638.10
  6. Step 6: Final answer
    x = 13,993.75

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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.