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Finding the Fourth Proportional to 8,711.62, 12,021.64 and 4,934.70

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Solution

The fourth proportional to 8,711.62, 12,021.64 and 4,934.70 is: 6,809.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,711.62 : 12,021.64 = 4,934.70 : x
  2. Step 2: Convert to fraction form
    8,711.62/12,021.64 = 4,934.70/x
  3. Step 3: Cross multiply
    8,711.62x = 12,021.64 × 4,934.70
  4. Step 4: Simplify right side
    8,711.62x = 59,323,253.80
  5. Step 5: Solve for x
    x = 59,323,253.80/8,711.62
  6. Step 6: Final answer
    x = 6,809.67

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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.