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Finding the Fourth Proportional to 18,672.08, 28,008.12 and 4,820

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Solution

The fourth proportional to 18,672.08, 28,008.12 and 4,820 is: 7,230

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.08 : 28,008.12 = 4,820 : x
  2. Step 2: Convert to fraction form
    18,672.08/28,008.12 = 4,820/x
  3. Step 3: Cross multiply
    18,672.08x = 28,008.12 × 4,820
  4. Step 4: Simplify right side
    18,672.08x = 134,999,138.40
  5. Step 5: Solve for x
    x = 134,999,138.40/18,672.08
  6. Step 6: Final answer
    x = 7,230

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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.