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Finding the Fourth Proportional to 18,709.62, 28,070.34 and 8,174.76

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Solution

The fourth proportional to 18,709.62, 28,070.34 and 8,174.76 is: 12,264.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.62 : 28,070.34 = 8,174.76 : x
  2. Step 2: Convert to fraction form
    18,709.62/28,070.34 = 8,174.76/x
  3. Step 3: Cross multiply
    18,709.62x = 28,070.34 × 8,174.76
  4. Step 4: Simplify right side
    18,709.62x = 229,468,292.62
  5. Step 5: Solve for x
    x = 229,468,292.62/18,709.62
  6. Step 6: Final answer
    x = 12,264.72

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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.