Home / 13,914.57-20,871.87-5,139.24

Finding the Fourth Proportional to 13,914.57, 20,871.87 and 5,139.24

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Solution

The fourth proportional to 13,914.57, 20,871.87 and 5,139.24 is: 7,708.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,914.57 : 20,871.87 = 5,139.24 : x
  2. Step 2: Convert to fraction form
    13,914.57/20,871.87 = 5,139.24/x
  3. Step 3: Cross multiply
    13,914.57x = 20,871.87 × 5,139.24
  4. Step 4: Simplify right side
    13,914.57x = 107,265,549.18
  5. Step 5: Solve for x
    x = 107,265,549.18/13,914.57
  6. Step 6: Final answer
    x = 7,708.87

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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.