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Finding the Fourth Proportional to 15,551.19, 21,459.92 and 8,836.65

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Solution

The fourth proportional to 15,551.19, 21,459.92 and 8,836.65 is: 12,194.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,551.19 : 21,459.92 = 8,836.65 : x
  2. Step 2: Convert to fraction form
    15,551.19/21,459.92 = 8,836.65/x
  3. Step 3: Cross multiply
    15,551.19x = 21,459.92 × 8,836.65
  4. Step 4: Simplify right side
    15,551.19x = 189,633,757.88
  5. Step 5: Solve for x
    x = 189,633,757.88/15,551.19
  6. Step 6: Final answer
    x = 12,194.16

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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.