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Finding the Fourth Proportional to 18,479.79, 27,734.27 and 8,613.99

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Solution

The fourth proportional to 18,479.79, 27,734.27 and 8,613.99 is: 12,927.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.79 : 27,734.27 = 8,613.99 : x
  2. Step 2: Convert to fraction form
    18,479.79/27,734.27 = 8,613.99/x
  3. Step 3: Cross multiply
    18,479.79x = 27,734.27 × 8,613.99
  4. Step 4: Simplify right side
    18,479.79x = 238,902,681.37
  5. Step 5: Solve for x
    x = 238,902,681.37/18,479.79
  6. Step 6: Final answer
    x = 12,927.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.