Home / 20,918.41-31,381.47-6,879.22

Finding the Fourth Proportional to 20,918.41, 31,381.47 and 6,879.22

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Solution

The fourth proportional to 20,918.41, 31,381.47 and 6,879.22 is: 10,320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.41 : 31,381.47 = 6,879.22 : x
  2. Step 2: Convert to fraction form
    20,918.41/31,381.47 = 6,879.22/x
  3. Step 3: Cross multiply
    20,918.41x = 31,381.47 × 6,879.22
  4. Step 4: Simplify right side
    20,918.41x = 215,879,957.60
  5. Step 5: Solve for x
    x = 215,879,957.60/20,918.41
  6. Step 6: Final answer
    x = 10,320.10

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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.