Home / 8,721.84-13,084.20-2,878.80

Finding the Fourth Proportional to 8,721.84, 13,084.20 and 2,878.80

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Solution

The fourth proportional to 8,721.84, 13,084.20 and 2,878.80 is: 4,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,721.84 : 13,084.20 = 2,878.80 : x
  2. Step 2: Convert to fraction form
    8,721.84/13,084.20 = 2,878.80/x
  3. Step 3: Cross multiply
    8,721.84x = 13,084.20 × 2,878.80
  4. Step 4: Simplify right side
    8,721.84x = 37,666,794.96
  5. Step 5: Solve for x
    x = 37,666,794.96/8,721.84
  6. Step 6: Final answer
    x = 4,318.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.