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Finding the Fourth Proportional to 11,472.64, 15,831.68 and 6,503.68

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Solution

The fourth proportional to 11,472.64, 15,831.68 and 6,503.68 is: 8,974.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,472.64 : 15,831.68 = 6,503.68 : x
  2. Step 2: Convert to fraction form
    11,472.64/15,831.68 = 6,503.68/x
  3. Step 3: Cross multiply
    11,472.64x = 15,831.68 × 6,503.68
  4. Step 4: Simplify right side
    11,472.64x = 102,964,180.58
  5. Step 5: Solve for x
    x = 102,964,180.58/11,472.64
  6. Step 6: Final answer
    x = 8,974.76

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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.