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Finding the Fourth Proportional to 15,653.13, 21,601.86 and 8,579.49

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Solution

The fourth proportional to 15,653.13, 21,601.86 and 8,579.49 is: 11,839.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.13 : 21,601.86 = 8,579.49 : x
  2. Step 2: Convert to fraction form
    15,653.13/21,601.86 = 8,579.49/x
  3. Step 3: Cross multiply
    15,653.13x = 21,601.86 × 8,579.49
  4. Step 4: Simplify right side
    15,653.13x = 185,332,941.85
  5. Step 5: Solve for x
    x = 185,332,941.85/15,653.13
  6. Step 6: Final answer
    x = 11,839.99

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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.