Home / 13,679.28-18,877.38-7,391.64

Finding the Fourth Proportional to 13,679.28, 18,877.38 and 7,391.64

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Solution

The fourth proportional to 13,679.28, 18,877.38 and 7,391.64 is: 10,200.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.28 : 18,877.38 = 7,391.64 : x
  2. Step 2: Convert to fraction form
    13,679.28/18,877.38 = 7,391.64/x
  3. Step 3: Cross multiply
    13,679.28x = 18,877.38 × 7,391.64
  4. Step 4: Simplify right side
    13,679.28x = 139,534,797.10
  5. Step 5: Solve for x
    x = 139,534,797.10/13,679.28
  6. Step 6: Final answer
    x = 10,200.45

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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.