Home / 8,686.35-11,986.56-4,909.70

Finding the Fourth Proportional to 8,686.35, 11,986.56 and 4,909.70

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Solution

The fourth proportional to 8,686.35, 11,986.56 and 4,909.70 is: 6,775.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.35 : 11,986.56 = 4,909.70 : x
  2. Step 2: Convert to fraction form
    8,686.35/11,986.56 = 4,909.70/x
  3. Step 3: Cross multiply
    8,686.35x = 11,986.56 × 4,909.70
  4. Step 4: Simplify right side
    8,686.35x = 58,850,353.70
  5. Step 5: Solve for x
    x = 58,850,353.70/8,686.35
  6. Step 6: Final answer
    x = 6,775.04

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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.