Home / 20,913.96-28,859.49-11,960.01

Finding the Fourth Proportional to 20,913.96, 28,859.49 and 11,960.01

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Solution

The fourth proportional to 20,913.96, 28,859.49 and 11,960.01 is: 16,503.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.96 : 28,859.49 = 11,960.01 : x
  2. Step 2: Convert to fraction form
    20,913.96/28,859.49 = 11,960.01/x
  3. Step 3: Cross multiply
    20,913.96x = 28,859.49 × 11,960.01
  4. Step 4: Simplify right side
    20,913.96x = 345,159,788.99
  5. Step 5: Solve for x
    x = 345,159,788.99/20,913.96
  6. Step 6: Final answer
    x = 16,503.80

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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.