Home / 12,120.36-16,721.82-7,931.04

Finding the Fourth Proportional to 12,120.36, 16,721.82 and 7,931.04

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Solution

The fourth proportional to 12,120.36, 16,721.82 and 7,931.04 is: 10,942.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.36 : 16,721.82 = 7,931.04 : x
  2. Step 2: Convert to fraction form
    12,120.36/16,721.82 = 7,931.04/x
  3. Step 3: Cross multiply
    12,120.36x = 16,721.82 × 7,931.04
  4. Step 4: Simplify right side
    12,120.36x = 132,621,423.29
  5. Step 5: Solve for x
    x = 132,621,423.29/12,120.36
  6. Step 6: Final answer
    x = 10,942.04

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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.