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Finding the Fourth Proportional to 8,487.59, 11,711.90 and 4,709.77

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Solution

The fourth proportional to 8,487.59, 11,711.90 and 4,709.77 is: 6,498.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,487.59 : 11,711.90 = 4,709.77 : x
  2. Step 2: Convert to fraction form
    8,487.59/11,711.90 = 4,709.77/x
  3. Step 3: Cross multiply
    8,487.59x = 11,711.90 × 4,709.77
  4. Step 4: Simplify right side
    8,487.59x = 55,160,337.76
  5. Step 5: Solve for x
    x = 55,160,337.76/8,487.59
  6. Step 6: Final answer
    x = 6,498.94

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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.