Home / 20,759.18-31,121.31-9,660.22

Finding the Fourth Proportional to 20,759.18, 31,121.31 and 9,660.22

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Solution

The fourth proportional to 20,759.18, 31,121.31 and 9,660.22 is: 14,482.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.18 : 31,121.31 = 9,660.22 : x
  2. Step 2: Convert to fraction form
    20,759.18/31,121.31 = 9,660.22/x
  3. Step 3: Cross multiply
    20,759.18x = 31,121.31 × 9,660.22
  4. Step 4: Simplify right side
    20,759.18x = 300,638,701.29
  5. Step 5: Solve for x
    x = 300,638,701.29/20,759.18
  6. Step 6: Final answer
    x = 14,482.21

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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.