Home / 20,579.36-28,399.53-11,147.96

Finding the Fourth Proportional to 20,579.36, 28,399.53 and 11,147.96

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Solution

The fourth proportional to 20,579.36, 28,399.53 and 11,147.96 is: 15,384.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,579.36 : 28,399.53 = 11,147.96 : x
  2. Step 2: Convert to fraction form
    20,579.36/28,399.53 = 11,147.96/x
  3. Step 3: Cross multiply
    20,579.36x = 28,399.53 × 11,147.96
  4. Step 4: Simplify right side
    20,579.36x = 316,596,824.46
  5. Step 5: Solve for x
    x = 316,596,824.46/20,579.36
  6. Step 6: Final answer
    x = 15,384.19

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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.