Home / 20,665.67-28,529.21-18,648.77

Finding the Fourth Proportional to 20,665.67, 28,529.21 and 18,648.77

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Solution

The fourth proportional to 20,665.67, 28,529.21 and 18,648.77 is: 25,744.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.67 : 28,529.21 = 18,648.77 : x
  2. Step 2: Convert to fraction form
    20,665.67/28,529.21 = 18,648.77/x
  3. Step 3: Cross multiply
    20,665.67x = 28,529.21 × 18,648.77
  4. Step 4: Simplify right side
    20,665.67x = 532,034,579.55
  5. Step 5: Solve for x
    x = 532,034,579.55/20,665.67
  6. Step 6: Final answer
    x = 25,744.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.