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Finding the Fourth Proportional to 8,787.76, 12,127.47 and 4,809.22

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Solution

The fourth proportional to 8,787.76, 12,127.47 and 4,809.22 is: 6,636.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.76 : 12,127.47 = 4,809.22 : x
  2. Step 2: Convert to fraction form
    8,787.76/12,127.47 = 4,809.22/x
  3. Step 3: Cross multiply
    8,787.76x = 12,127.47 × 4,809.22
  4. Step 4: Simplify right side
    8,787.76x = 58,323,671.27
  5. Step 5: Solve for x
    x = 58,323,671.27/8,787.76
  6. Step 6: Final answer
    x = 6,636.92

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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.