Home / 8,531.89-12,800.75-5,206.80

Finding the Fourth Proportional to 8,531.89, 12,800.75 and 5,206.80

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Solution

The fourth proportional to 8,531.89, 12,800.75 and 5,206.80 is: 7,811.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,531.89 : 12,800.75 = 5,206.80 : x
  2. Step 2: Convert to fraction form
    8,531.89/12,800.75 = 5,206.80/x
  3. Step 3: Cross multiply
    8,531.89x = 12,800.75 × 5,206.80
  4. Step 4: Simplify right side
    8,531.89x = 66,650,945.10
  5. Step 5: Solve for x
    x = 66,650,945.10/8,531.89
  6. Step 6: Final answer
    x = 7,811.98

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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.