Home / 20,918.63-28,867.91-11,487.39

Finding the Fourth Proportional to 20,918.63, 28,867.91 and 11,487.39

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Solution

The fourth proportional to 20,918.63, 28,867.91 and 11,487.39 is: 15,852.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.63 : 28,867.91 = 11,487.39 : x
  2. Step 2: Convert to fraction form
    20,918.63/28,867.91 = 11,487.39/x
  3. Step 3: Cross multiply
    20,918.63x = 28,867.91 × 11,487.39
  4. Step 4: Simplify right side
    20,918.63x = 331,616,883.22
  5. Step 5: Solve for x
    x = 331,616,883.22/20,918.63
  6. Step 6: Final answer
    x = 15,852.71

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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.