Home / 20,913.49-28,858.83-11,959.55

Finding the Fourth Proportional to 20,913.49, 28,858.83 and 11,959.55

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Solution

The fourth proportional to 20,913.49, 28,858.83 and 11,959.55 is: 16,503.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.49 : 28,858.83 = 11,959.55 : x
  2. Step 2: Convert to fraction form
    20,913.49/28,858.83 = 11,959.55/x
  3. Step 3: Cross multiply
    20,913.49x = 28,858.83 × 11,959.55
  4. Step 4: Simplify right side
    20,913.49x = 345,138,606.68
  5. Step 5: Solve for x
    x = 345,138,606.68/20,913.49
  6. Step 6: Final answer
    x = 16,503.16

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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.