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Finding the Fourth Proportional to 8,787.99, 12,126.87 and 4,809.15

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Solution

The fourth proportional to 8,787.99, 12,126.87 and 4,809.15 is: 6,636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,787.99 : 12,126.87 = 4,809.15 : x
  2. Step 2: Convert to fraction form
    8,787.99/12,126.87 = 4,809.15/x
  3. Step 3: Cross multiply
    8,787.99x = 12,126.87 × 4,809.15
  4. Step 4: Simplify right side
    8,787.99x = 58,319,936.86
  5. Step 5: Solve for x
    x = 58,319,936.86/8,787.99
  6. Step 6: Final answer
    x = 6,636.32

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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.