Home / 20,755.08-31,000.23-18,777.65

Finding the Fourth Proportional to 20,755.08, 31,000.23 and 18,777.65

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Solution

The fourth proportional to 20,755.08, 31,000.23 and 18,777.65 is: 28,046.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,755.08 : 31,000.23 = 18,777.65 : x
  2. Step 2: Convert to fraction form
    20,755.08/31,000.23 = 18,777.65/x
  3. Step 3: Cross multiply
    20,755.08x = 31,000.23 × 18,777.65
  4. Step 4: Simplify right side
    20,755.08x = 582,111,313.86
  5. Step 5: Solve for x
    x = 582,111,313.86/20,755.08
  6. Step 6: Final answer
    x = 28,046.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.