Home / 15,090.39-20,828-11,514.64

Finding the Fourth Proportional to 15,090.39, 20,828 and 11,514.64

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Solution

The fourth proportional to 15,090.39, 20,828 and 11,514.64 is: 15,892.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.39 : 20,828 = 11,514.64 : x
  2. Step 2: Convert to fraction form
    15,090.39/20,828 = 11,514.64/x
  3. Step 3: Cross multiply
    15,090.39x = 20,828 × 11,514.64
  4. Step 4: Simplify right side
    15,090.39x = 239,826,921.92
  5. Step 5: Solve for x
    x = 239,826,921.92/15,090.39
  6. Step 6: Final answer
    x = 15,892.69

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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.