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Finding the Fourth Proportional to 8,125.84, 11,212.84 and 4,721.92

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Solution

The fourth proportional to 8,125.84, 11,212.84 and 4,721.92 is: 6,515.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,125.84 : 11,212.84 = 4,721.92 : x
  2. Step 2: Convert to fraction form
    8,125.84/11,212.84 = 4,721.92/x
  3. Step 3: Cross multiply
    8,125.84x = 11,212.84 × 4,721.92
  4. Step 4: Simplify right side
    8,125.84x = 52,946,133.45
  5. Step 5: Solve for x
    x = 52,946,133.45/8,125.84
  6. Step 6: Final answer
    x = 6,515.77

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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.