Home / 20,939.07-31,412.87-18,847.86

Finding the Fourth Proportional to 20,939.07, 31,412.87 and 18,847.86

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Solution

The fourth proportional to 20,939.07, 31,412.87 and 18,847.86 is: 28,275.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.07 : 31,412.87 = 18,847.86 : x
  2. Step 2: Convert to fraction form
    20,939.07/31,412.87 = 18,847.86/x
  3. Step 3: Cross multiply
    20,939.07x = 31,412.87 × 18,847.86
  4. Step 4: Simplify right side
    20,939.07x = 592,065,375.96
  5. Step 5: Solve for x
    x = 592,065,375.96/20,939.07
  6. Step 6: Final answer
    x = 28,275.63

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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.