Home / 8,686.31-11,986.38-4,909.28

Finding the Fourth Proportional to 8,686.31, 11,986.38 and 4,909.28

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Solution

The fourth proportional to 8,686.31, 11,986.38 and 4,909.28 is: 6,774.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,686.31 : 11,986.38 = 4,909.28 : x
  2. Step 2: Convert to fraction form
    8,686.31/11,986.38 = 4,909.28/x
  3. Step 3: Cross multiply
    8,686.31x = 11,986.38 × 4,909.28
  4. Step 4: Simplify right side
    8,686.31x = 58,844,435.67
  5. Step 5: Solve for x
    x = 58,844,435.67/8,686.31
  6. Step 6: Final answer
    x = 6,774.39

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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.