Home / 20,727.60-31,091.40-18,686.40

Finding the Fourth Proportional to 20,727.60, 31,091.40 and 18,686.40

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Solution

The fourth proportional to 20,727.60, 31,091.40 and 18,686.40 is: 28,029.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,727.60 : 31,091.40 = 18,686.40 : x
  2. Step 2: Convert to fraction form
    20,727.60/31,091.40 = 18,686.40/x
  3. Step 3: Cross multiply
    20,727.60x = 31,091.40 × 18,686.40
  4. Step 4: Simplify right side
    20,727.60x = 580,986,336.96
  5. Step 5: Solve for x
    x = 580,986,336.96/20,727.60
  6. Step 6: Final answer
    x = 28,029.60

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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.