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Finding the Fourth Proportional to 8,557.30, 11,809.05 and 4,831.30

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Solution

The fourth proportional to 8,557.30, 11,809.05 and 4,831.30 is: 6,667.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,557.30 : 11,809.05 = 4,831.30 : x
  2. Step 2: Convert to fraction form
    8,557.30/11,809.05 = 4,831.30/x
  3. Step 3: Cross multiply
    8,557.30x = 11,809.05 × 4,831.30
  4. Step 4: Simplify right side
    8,557.30x = 57,053,063.27
  5. Step 5: Solve for x
    x = 57,053,063.27/8,557.30
  6. Step 6: Final answer
    x = 6,667.18

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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.