Home / 13,919.28-20,887.02-5,160.30

Finding the Fourth Proportional to 13,919.28, 20,887.02 and 5,160.30

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Solution

The fourth proportional to 13,919.28, 20,887.02 and 5,160.30 is: 7,743.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,919.28 : 20,887.02 = 5,160.30 : x
  2. Step 2: Convert to fraction form
    13,919.28/20,887.02 = 5,160.30/x
  3. Step 3: Cross multiply
    13,919.28x = 20,887.02 × 5,160.30
  4. Step 4: Simplify right side
    13,919.28x = 107,783,289.31
  5. Step 5: Solve for x
    x = 107,783,289.31/13,919.28
  6. Step 6: Final answer
    x = 7,743.45

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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.