Home / 12,784.80-17,639.58-7,480.92

Finding the Fourth Proportional to 12,784.80, 17,639.58 and 7,480.92

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Solution

The fourth proportional to 12,784.80, 17,639.58 and 7,480.92 is: 10,321.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,784.80 : 17,639.58 = 7,480.92 : x
  2. Step 2: Convert to fraction form
    12,784.80/17,639.58 = 7,480.92/x
  3. Step 3: Cross multiply
    12,784.80x = 17,639.58 × 7,480.92
  4. Step 4: Simplify right side
    12,784.80x = 131,960,286.81
  5. Step 5: Solve for x
    x = 131,960,286.81/12,784.80
  6. Step 6: Final answer
    x = 10,321.65

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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.