Home / 8,328.67-11,480.20-5,639.03

Finding the Fourth Proportional to 8,328.67, 11,480.20 and 5,639.03

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Solution

The fourth proportional to 8,328.67, 11,480.20 and 5,639.03 is: 7,772.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,328.67 : 11,480.20 = 5,639.03 : x
  2. Step 2: Convert to fraction form
    8,328.67/11,480.20 = 5,639.03/x
  3. Step 3: Cross multiply
    8,328.67x = 11,480.20 × 5,639.03
  4. Step 4: Simplify right side
    8,328.67x = 64,737,106.61
  5. Step 5: Solve for x
    x = 64,737,106.61/8,328.67
  6. Step 6: Final answer
    x = 7,772.81

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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.