Home / 20,958.18-28,923.68-13,005.74

Finding the Fourth Proportional to 20,958.18, 28,923.68 and 13,005.74

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Solution

The fourth proportional to 20,958.18, 28,923.68 and 13,005.74 is: 17,948.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.18 : 28,923.68 = 13,005.74 : x
  2. Step 2: Convert to fraction form
    20,958.18/28,923.68 = 13,005.74/x
  3. Step 3: Cross multiply
    20,958.18x = 28,923.68 × 13,005.74
  4. Step 4: Simplify right side
    20,958.18x = 376,173,861.92
  5. Step 5: Solve for x
    x = 376,173,861.92/20,958.18
  6. Step 6: Final answer
    x = 17,948.78

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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.