Home / 20,917.80-31,381.20-6,125.58

Finding the Fourth Proportional to 20,917.80, 31,381.20 and 6,125.58

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Solution

The fourth proportional to 20,917.80, 31,381.20 and 6,125.58 is: 9,189.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.80 : 31,381.20 = 6,125.58 : x
  2. Step 2: Convert to fraction form
    20,917.80/31,381.20 = 6,125.58/x
  3. Step 3: Cross multiply
    20,917.80x = 31,381.20 × 6,125.58
  4. Step 4: Simplify right side
    20,917.80x = 192,228,051.10
  5. Step 5: Solve for x
    x = 192,228,051.10/20,917.80
  6. Step 6: Final answer
    x = 9,189.69

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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.