Home / 12,192.36-18,288.63-3,872.40

Finding the Fourth Proportional to 12,192.36, 18,288.63 and 3,872.40

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Solution

The fourth proportional to 12,192.36, 18,288.63 and 3,872.40 is: 5,808.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,192.36 : 18,288.63 = 3,872.40 : x
  2. Step 2: Convert to fraction form
    12,192.36/18,288.63 = 3,872.40/x
  3. Step 3: Cross multiply
    12,192.36x = 18,288.63 × 3,872.40
  4. Step 4: Simplify right side
    12,192.36x = 70,820,890.81
  5. Step 5: Solve for x
    x = 70,820,890.81/12,192.36
  6. Step 6: Final answer
    x = 5,808.63

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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.