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Finding the Fourth Proportional to 8,669.84, 12,999.86 and 5,160.92

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Solution

The fourth proportional to 8,669.84, 12,999.86 and 5,160.92 is: 7,738.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.84 : 12,999.86 = 5,160.92 : x
  2. Step 2: Convert to fraction form
    8,669.84/12,999.86 = 5,160.92/x
  3. Step 3: Cross multiply
    8,669.84x = 12,999.86 × 5,160.92
  4. Step 4: Simplify right side
    8,669.84x = 67,091,237.47
  5. Step 5: Solve for x
    x = 67,091,237.47/8,669.84
  6. Step 6: Final answer
    x = 7,738.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.