Home / 20,679.15-30,994.12-11,895.61

Finding the Fourth Proportional to 20,679.15, 30,994.12 and 11,895.61

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Solution

The fourth proportional to 20,679.15, 30,994.12 and 11,895.61 is: 17,829.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679.15 : 30,994.12 = 11,895.61 : x
  2. Step 2: Convert to fraction form
    20,679.15/30,994.12 = 11,895.61/x
  3. Step 3: Cross multiply
    20,679.15x = 30,994.12 × 11,895.61
  4. Step 4: Simplify right side
    20,679.15x = 368,693,925.85
  5. Step 5: Solve for x
    x = 368,693,925.85/20,679.15
  6. Step 6: Final answer
    x = 17,829.26

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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.