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Finding the Fourth Proportional to 8,709.75, 12,019.67 and 4,730.86

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Solution

The fourth proportional to 8,709.75, 12,019.67 and 4,730.86 is: 6,528.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.75 : 12,019.67 = 4,730.86 : x
  2. Step 2: Convert to fraction form
    8,709.75/12,019.67 = 4,730.86/x
  3. Step 3: Cross multiply
    8,709.75x = 12,019.67 × 4,730.86
  4. Step 4: Simplify right side
    8,709.75x = 56,863,411.74
  5. Step 5: Solve for x
    x = 56,863,411.74/8,709.75
  6. Step 6: Final answer
    x = 6,528.71

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1.5x scale

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.