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Finding the Fourth Proportional to 8,483.76, 11,708.36 and 5,128.24

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Solution

The fourth proportional to 8,483.76, 11,708.36 and 5,128.24 is: 7,077.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,483.76 : 11,708.36 = 5,128.24 : x
  2. Step 2: Convert to fraction form
    8,483.76/11,708.36 = 5,128.24/x
  3. Step 3: Cross multiply
    8,483.76x = 11,708.36 × 5,128.24
  4. Step 4: Simplify right side
    8,483.76x = 60,043,280.09
  5. Step 5: Solve for x
    x = 60,043,280.09/8,483.76
  6. Step 6: Final answer
    x = 7,077.44

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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.