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Finding the Fourth Proportional to 8,684.94, 11,985.21 and 4,907.92

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Solution

The fourth proportional to 8,684.94, 11,985.21 and 4,907.92 is: 6,772.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,684.94 : 11,985.21 = 4,907.92 : x
  2. Step 2: Convert to fraction form
    8,684.94/11,985.21 = 4,907.92/x
  3. Step 3: Cross multiply
    8,684.94x = 11,985.21 × 4,907.92
  4. Step 4: Simplify right side
    8,684.94x = 58,822,451.86
  5. Step 5: Solve for x
    x = 58,822,451.86/8,684.94
  6. Step 6: Final answer
    x = 6,772.93

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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.