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Finding the Fourth Proportional to 18,695.81, 28,035.50 and 7,000.82

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Solution

The fourth proportional to 18,695.81, 28,035.50 and 7,000.82 is: 10,498.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,695.81 : 28,035.50 = 7,000.82 : x
  2. Step 2: Convert to fraction form
    18,695.81/28,035.50 = 7,000.82/x
  3. Step 3: Cross multiply
    18,695.81x = 28,035.50 × 7,000.82
  4. Step 4: Simplify right side
    18,695.81x = 196,271,524.19
  5. Step 5: Solve for x
    x = 196,271,524.19/18,695.81
  6. Step 6: Final answer
    x = 10,498.16

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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.