Home / 30,721.80-46,076.40-8,529.60

Finding the Fourth Proportional to 30,721.80, 46,076.40 and 8,529.60

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Solution

The fourth proportional to 30,721.80, 46,076.40 and 8,529.60 is: 12,792.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,721.80 : 46,076.40 = 8,529.60 : x
  2. Step 2: Convert to fraction form
    30,721.80/46,076.40 = 8,529.60/x
  3. Step 3: Cross multiply
    30,721.80x = 46,076.40 × 8,529.60
  4. Step 4: Simplify right side
    30,721.80x = 393,013,261.44
  5. Step 5: Solve for x
    x = 393,013,261.44/30,721.80
  6. Step 6: Final answer
    x = 12,792.65

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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.