Home / 8,531.80-12,789.40-5,245.84

Finding the Fourth Proportional to 8,531.80, 12,789.40 and 5,245.84

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Solution

The fourth proportional to 8,531.80, 12,789.40 and 5,245.84 is: 7,863.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.80 : 12,789.40 = 5,245.84 : x
  2. Step 2: Convert to fraction form
    8,531.80/12,789.40 = 5,245.84/x
  3. Step 3: Cross multiply
    8,531.80x = 12,789.40 × 5,245.84
  4. Step 4: Simplify right side
    8,531.80x = 67,091,146.10
  5. Step 5: Solve for x
    x = 67,091,146.10/8,531.80
  6. Step 6: Final answer
    x = 7,863.66

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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.