Home / 20,859.89-31,293.90-9,173.07

Finding the Fourth Proportional to 20,859.89, 31,293.90 and 9,173.07

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Solution

The fourth proportional to 20,859.89, 31,293.90 and 9,173.07 is: 13,761.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.89 : 31,293.90 = 9,173.07 : x
  2. Step 2: Convert to fraction form
    20,859.89/31,293.90 = 9,173.07/x
  3. Step 3: Cross multiply
    20,859.89x = 31,293.90 × 9,173.07
  4. Step 4: Simplify right side
    20,859.89x = 287,061,135.27
  5. Step 5: Solve for x
    x = 287,061,135.27/20,859.89
  6. Step 6: Final answer
    x = 13,761.40

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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.