Home / 20,723.60-31,117.80-11,975.60

Finding the Fourth Proportional to 20,723.60, 31,117.80 and 11,975.60

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Solution

The fourth proportional to 20,723.60, 31,117.80 and 11,975.60 is: 17,982.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.60 : 31,117.80 = 11,975.60 : x
  2. Step 2: Convert to fraction form
    20,723.60/31,117.80 = 11,975.60/x
  3. Step 3: Cross multiply
    20,723.60x = 31,117.80 × 11,975.60
  4. Step 4: Simplify right side
    20,723.60x = 372,654,325.68
  5. Step 5: Solve for x
    x = 372,654,325.68/20,723.60
  6. Step 6: Final answer
    x = 17,982.12

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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.