Home / 15,721.52-21,695.49-8,647.79

Finding the Fourth Proportional to 15,721.52, 21,695.49 and 8,647.79

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Solution

The fourth proportional to 15,721.52, 21,695.49 and 8,647.79 is: 11,933.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.52 : 21,695.49 = 8,647.79 : x
  2. Step 2: Convert to fraction form
    15,721.52/21,695.49 = 8,647.79/x
  3. Step 3: Cross multiply
    15,721.52x = 21,695.49 × 8,647.79
  4. Step 4: Simplify right side
    15,721.52x = 187,617,932.99
  5. Step 5: Solve for x
    x = 187,617,932.99/15,721.52
  6. Step 6: Final answer
    x = 11,933.83

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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.