Home / 20,940.47-31,405.83-6,145.41

Finding the Fourth Proportional to 20,940.47, 31,405.83 and 6,145.41

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Solution

The fourth proportional to 20,940.47, 31,405.83 and 6,145.41 is: 9,216.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.47 : 31,405.83 = 6,145.41 : x
  2. Step 2: Convert to fraction form
    20,940.47/31,405.83 = 6,145.41/x
  3. Step 3: Cross multiply
    20,940.47x = 31,405.83 × 6,145.41
  4. Step 4: Simplify right side
    20,940.47x = 193,001,701.74
  5. Step 5: Solve for x
    x = 193,001,701.74/20,940.47
  6. Step 6: Final answer
    x = 9,216.69

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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.