Home / 8,126.40-12,165.30-7,645.80

Finding the Fourth Proportional to 8,126.40, 12,165.30 and 7,645.80

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Solution

The fourth proportional to 8,126.40, 12,165.30 and 7,645.80 is: 11,445.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,126.40 : 12,165.30 = 7,645.80 : x
  2. Step 2: Convert to fraction form
    8,126.40/12,165.30 = 7,645.80/x
  3. Step 3: Cross multiply
    8,126.40x = 12,165.30 × 7,645.80
  4. Step 4: Simplify right side
    8,126.40x = 93,013,450.74
  5. Step 5: Solve for x
    x = 93,013,450.74/8,126.40
  6. Step 6: Final answer
    x = 11,445.84

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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.