Home / 20,983.20-28,950.96-13,025.76

Finding the Fourth Proportional to 20,983.20, 28,950.96 and 13,025.76

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Solution

The fourth proportional to 20,983.20, 28,950.96 and 13,025.76 is: 17,971.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983.20 : 28,950.96 = 13,025.76 : x
  2. Step 2: Convert to fraction form
    20,983.20/28,950.96 = 13,025.76/x
  3. Step 3: Cross multiply
    20,983.20x = 28,950.96 × 13,025.76
  4. Step 4: Simplify right side
    20,983.20x = 377,108,256.73
  5. Step 5: Solve for x
    x = 377,108,256.73/20,983.20
  6. Step 6: Final answer
    x = 17,971.91

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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.