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Finding the Fourth Proportional to 18,611.12, 27,927.96 and 7,516.40

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Solution

The fourth proportional to 18,611.12, 27,927.96 and 7,516.40 is: 11,279.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.12 : 27,927.96 = 7,516.40 : x
  2. Step 2: Convert to fraction form
    18,611.12/27,927.96 = 7,516.40/x
  3. Step 3: Cross multiply
    18,611.12x = 27,927.96 × 7,516.40
  4. Step 4: Simplify right side
    18,611.12x = 209,917,718.54
  5. Step 5: Solve for x
    x = 209,917,718.54/18,611.12
  6. Step 6: Final answer
    x = 11,279.16

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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.