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Finding the Fourth Proportional to 18,758.32, 28,141.64 and 7,071.64

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Solution

The fourth proportional to 18,758.32, 28,141.64 and 7,071.64 is: 10,609.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.32 : 28,141.64 = 7,071.64 : x
  2. Step 2: Convert to fraction form
    18,758.32/28,141.64 = 7,071.64/x
  3. Step 3: Cross multiply
    18,758.32x = 28,141.64 × 7,071.64
  4. Step 4: Simplify right side
    18,758.32x = 199,007,547.09
  5. Step 5: Solve for x
    x = 199,007,547.09/18,758.32
  6. Step 6: Final answer
    x = 10,609.03

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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.