Home / 12,120.74-16,718.39-7,864.19

Finding the Fourth Proportional to 12,120.74, 16,718.39 and 7,864.19

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Solution

The fourth proportional to 12,120.74, 16,718.39 and 7,864.19 is: 10,847.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,120.74 : 16,718.39 = 7,864.19 : x
  2. Step 2: Convert to fraction form
    12,120.74/16,718.39 = 7,864.19/x
  3. Step 3: Cross multiply
    12,120.74x = 16,718.39 × 7,864.19
  4. Step 4: Simplify right side
    12,120.74x = 131,476,564.73
  5. Step 5: Solve for x
    x = 131,476,564.73/12,120.74
  6. Step 6: Final answer
    x = 10,847.24

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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.