Home / 20,579.59-28,399.82-11,148.15

Finding the Fourth Proportional to 20,579.59, 28,399.82 and 11,148.15

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Solution

The fourth proportional to 20,579.59, 28,399.82 and 11,148.15 is: 15,384.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.59 : 28,399.82 = 11,148.15 : x
  2. Step 2: Convert to fraction form
    20,579.59/28,399.82 = 11,148.15/x
  3. Step 3: Cross multiply
    20,579.59x = 28,399.82 × 11,148.15
  4. Step 4: Simplify right side
    20,579.59x = 316,605,453.33
  5. Step 5: Solve for x
    x = 316,605,453.33/20,579.59
  6. Step 6: Final answer
    x = 15,384.44

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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.