Home / 19,628.72-29,425.79-7,790.80

Finding the Fourth Proportional to 19,628.72, 29,425.79 and 7,790.80

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Solution

The fourth proportional to 19,628.72, 29,425.79 and 7,790.80 is: 11,679.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,628.72 : 29,425.79 = 7,790.80 : x
  2. Step 2: Convert to fraction form
    19,628.72/29,425.79 = 7,790.80/x
  3. Step 3: Cross multiply
    19,628.72x = 29,425.79 × 7,790.80
  4. Step 4: Simplify right side
    19,628.72x = 229,250,332.21
  5. Step 5: Solve for x
    x = 229,250,332.21/19,628.72
  6. Step 6: Final answer
    x = 11,679.33

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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.