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Finding the Fourth Proportional to 8,709.72, 12,019.50 and 4,730.87

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Solution

The fourth proportional to 8,709.72, 12,019.50 and 4,730.87 is: 6,528.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.72 : 12,019.50 = 4,730.87 : x
  2. Step 2: Convert to fraction form
    8,709.72/12,019.50 = 4,730.87/x
  3. Step 3: Cross multiply
    8,709.72x = 12,019.50 × 4,730.87
  4. Step 4: Simplify right side
    8,709.72x = 56,862,691.97
  5. Step 5: Solve for x
    x = 56,862,691.97/8,709.72
  6. Step 6: Final answer
    x = 6,528.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.