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Finding the Fourth Proportional to 15,653.11, 21,601.11 and 8,579.53

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Solution

The fourth proportional to 15,653.11, 21,601.11 and 8,579.53 is: 11,839.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,653.11 : 21,601.11 = 8,579.53 : x
  2. Step 2: Convert to fraction form
    15,653.11/21,601.11 = 8,579.53/x
  3. Step 3: Cross multiply
    15,653.11x = 21,601.11 × 8,579.53
  4. Step 4: Simplify right side
    15,653.11x = 185,327,371.28
  5. Step 5: Solve for x
    x = 185,327,371.28/15,653.11
  6. Step 6: Final answer
    x = 11,839.65

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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.