Home / 20,958.51-28,917.66-13,299

Finding the Fourth Proportional to 20,958.51, 28,917.66 and 13,299

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Solution

The fourth proportional to 20,958.51, 28,917.66 and 13,299 is: 18,349.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,958.51 : 28,917.66 = 13,299 : x
  2. Step 2: Convert to fraction form
    20,958.51/28,917.66 = 13,299/x
  3. Step 3: Cross multiply
    20,958.51x = 28,917.66 × 13,299
  4. Step 4: Simplify right side
    20,958.51x = 384,575,960.34
  5. Step 5: Solve for x
    x = 384,575,960.34/20,958.51
  6. Step 6: Final answer
    x = 18,349.39

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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.