Home / 12,103.28-18,129.40-5,534.99

Finding the Fourth Proportional to 12,103.28, 18,129.40 and 5,534.99

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Solution

The fourth proportional to 12,103.28, 18,129.40 and 5,534.99 is: 8,290.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.28 : 18,129.40 = 5,534.99 : x
  2. Step 2: Convert to fraction form
    12,103.28/18,129.40 = 5,534.99/x
  3. Step 3: Cross multiply
    12,103.28x = 18,129.40 × 5,534.99
  4. Step 4: Simplify right side
    12,103.28x = 100,345,943.22
  5. Step 5: Solve for x
    x = 100,345,943.22/12,103.28
  6. Step 6: Final answer
    x = 8,290.81

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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.