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Finding the Fourth Proportional to 15,579.30, 21,499.88 and 8,506.17

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Solution

The fourth proportional to 15,579.30, 21,499.88 and 8,506.17 is: 11,738.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,579.30 : 21,499.88 = 8,506.17 : x
  2. Step 2: Convert to fraction form
    15,579.30/21,499.88 = 8,506.17/x
  3. Step 3: Cross multiply
    15,579.30x = 21,499.88 × 8,506.17
  4. Step 4: Simplify right side
    15,579.30x = 182,881,591.73
  5. Step 5: Solve for x
    x = 182,881,591.73/15,579.30
  6. Step 6: Final answer
    x = 11,738.76

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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.