Home / 20,438.88-30,641.75-6,391.68

Finding the Fourth Proportional to 20,438.88, 30,641.75 and 6,391.68

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Solution

The fourth proportional to 20,438.88, 30,641.75 and 6,391.68 is: 9,582.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.88 : 30,641.75 = 6,391.68 : x
  2. Step 2: Convert to fraction form
    20,438.88/30,641.75 = 6,391.68/x
  3. Step 3: Cross multiply
    20,438.88x = 30,641.75 × 6,391.68
  4. Step 4: Simplify right side
    20,438.88x = 195,852,260.64
  5. Step 5: Solve for x
    x = 195,852,260.64/20,438.88
  6. Step 6: Final answer
    x = 9,582.34

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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.