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Finding the Fourth Proportional to 8,480.40, 12,721.86 and 4,533.72

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Solution

The fourth proportional to 8,480.40, 12,721.86 and 4,533.72 is: 6,801.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,480.40 : 12,721.86 = 4,533.72 : x
  2. Step 2: Convert to fraction form
    8,480.40/12,721.86 = 4,533.72/x
  3. Step 3: Cross multiply
    8,480.40x = 12,721.86 × 4,533.72
  4. Step 4: Simplify right side
    8,480.40x = 57,677,351.12
  5. Step 5: Solve for x
    x = 57,677,351.12/8,480.40
  6. Step 6: Final answer
    x = 6,801.25

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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.