Home / 12,990.12-17,923.77-7,685.79

Finding the Fourth Proportional to 12,990.12, 17,923.77 and 7,685.79

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Solution

The fourth proportional to 12,990.12, 17,923.77 and 7,685.79 is: 10,604.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.12 : 17,923.77 = 7,685.79 : x
  2. Step 2: Convert to fraction form
    12,990.12/17,923.77 = 7,685.79/x
  3. Step 3: Cross multiply
    12,990.12x = 17,923.77 × 7,685.79
  4. Step 4: Simplify right side
    12,990.12x = 137,758,332.23
  5. Step 5: Solve for x
    x = 137,758,332.23/12,990.12
  6. Step 6: Final answer
    x = 10,604.85

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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.