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Finding the Fourth Proportional to 15,662.15, 21,613.66 and 8,492.09

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Solution

The fourth proportional to 15,662.15, 21,613.66 and 8,492.09 is: 11,719.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,662.15 : 21,613.66 = 8,492.09 : x
  2. Step 2: Convert to fraction form
    15,662.15/21,613.66 = 8,492.09/x
  3. Step 3: Cross multiply
    15,662.15x = 21,613.66 × 8,492.09
  4. Step 4: Simplify right side
    15,662.15x = 183,545,016.65
  5. Step 5: Solve for x
    x = 183,545,016.65/15,662.15
  6. Step 6: Final answer
    x = 11,719.02

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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.