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Finding the Fourth Proportional to 8,761.88, 12,091.64 and 4,985.58

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Solution

The fourth proportional to 8,761.88, 12,091.64 and 4,985.58 is: 6,880.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,761.88 : 12,091.64 = 4,985.58 : x
  2. Step 2: Convert to fraction form
    8,761.88/12,091.64 = 4,985.58/x
  3. Step 3: Cross multiply
    8,761.88x = 12,091.64 × 4,985.58
  4. Step 4: Simplify right side
    8,761.88x = 60,283,838.55
  5. Step 5: Solve for x
    x = 60,283,838.55/8,761.88
  6. Step 6: Final answer
    x = 6,880.24

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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.