Home / 20,991.04-31,485.84-7,839.52

Finding the Fourth Proportional to 20,991.04, 31,485.84 and 7,839.52

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Solution

The fourth proportional to 20,991.04, 31,485.84 and 7,839.52 is: 11,759.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.04 : 31,485.84 = 7,839.52 : x
  2. Step 2: Convert to fraction form
    20,991.04/31,485.84 = 7,839.52/x
  3. Step 3: Cross multiply
    20,991.04x = 31,485.84 × 7,839.52
  4. Step 4: Simplify right side
    20,991.04x = 246,833,872.40
  5. Step 5: Solve for x
    x = 246,833,872.40/20,991.04
  6. Step 6: Final answer
    x = 11,759.01

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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.