Home / 20,839.59-28,757.93-11,889.99

Finding the Fourth Proportional to 20,839.59, 28,757.93 and 11,889.99

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Solution

The fourth proportional to 20,839.59, 28,757.93 and 11,889.99 is: 16,407.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.59 : 28,757.93 = 11,889.99 : x
  2. Step 2: Convert to fraction form
    20,839.59/28,757.93 = 11,889.99/x
  3. Step 3: Cross multiply
    20,839.59x = 28,757.93 × 11,889.99
  4. Step 4: Simplify right side
    20,839.59x = 341,931,440.67
  5. Step 5: Solve for x
    x = 341,931,440.67/20,839.59
  6. Step 6: Final answer
    x = 16,407.78

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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.