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Finding the Fourth Proportional to 8,787.88, 12,127.56 and 4,809.28

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Solution

The fourth proportional to 8,787.88, 12,127.56 and 4,809.28 is: 6,636.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.88 : 12,127.56 = 4,809.28 : x
  2. Step 2: Convert to fraction form
    8,787.88/12,127.56 = 4,809.28/x
  3. Step 3: Cross multiply
    8,787.88x = 12,127.56 × 4,809.28
  4. Step 4: Simplify right side
    8,787.88x = 58,324,831.76
  5. Step 5: Solve for x
    x = 58,324,831.76/8,787.88
  6. Step 6: Final answer
    x = 6,636.96

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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.