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Finding the Fourth Proportional to 8,708.78, 12,012.90 and 8,125.58

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Solution

The fourth proportional to 8,708.78, 12,012.90 and 8,125.58 is: 11,208.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,708.78 : 12,012.90 = 8,125.58 : x
  2. Step 2: Convert to fraction form
    8,708.78/12,012.90 = 8,125.58/x
  3. Step 3: Cross multiply
    8,708.78x = 12,012.90 × 8,125.58
  4. Step 4: Simplify right side
    8,708.78x = 97,611,779.98
  5. Step 5: Solve for x
    x = 97,611,779.98/8,708.78
  6. Step 6: Final answer
    x = 11,208.43

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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.