Home / 14,139.20-21,165.60-11,028.80

Finding the Fourth Proportional to 14,139.20, 21,165.60 and 11,028.80

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Solution

The fourth proportional to 14,139.20, 21,165.60 and 11,028.80 is: 16,509.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,139.20 : 21,165.60 = 11,028.80 : x
  2. Step 2: Convert to fraction form
    14,139.20/21,165.60 = 11,028.80/x
  3. Step 3: Cross multiply
    14,139.20x = 21,165.60 × 11,028.80
  4. Step 4: Simplify right side
    14,139.20x = 233,431,169.28
  5. Step 5: Solve for x
    x = 233,431,169.28/14,139.20
  6. Step 6: Final answer
    x = 16,509.50

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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.