Home / 15,694.36-21,658.37-8,620.79

Finding the Fourth Proportional to 15,694.36, 21,658.37 and 8,620.79

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Solution

The fourth proportional to 15,694.36, 21,658.37 and 8,620.79 is: 11,896.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,694.36 : 21,658.37 = 8,620.79 : x
  2. Step 2: Convert to fraction form
    15,694.36/21,658.37 = 8,620.79/x
  3. Step 3: Cross multiply
    15,694.36x = 21,658.37 × 8,620.79
  4. Step 4: Simplify right side
    15,694.36x = 186,712,156.61
  5. Step 5: Solve for x
    x = 186,712,156.61/15,694.36
  6. Step 6: Final answer
    x = 11,896.77

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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.