Home / 20,918.13-28,867.22-11,486.89

Finding the Fourth Proportional to 20,918.13, 28,867.22 and 11,486.89

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Solution

The fourth proportional to 20,918.13, 28,867.22 and 11,486.89 is: 15,852.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.13 : 28,867.22 = 11,486.89 : x
  2. Step 2: Convert to fraction form
    20,918.13/28,867.22 = 11,486.89/x
  3. Step 3: Cross multiply
    20,918.13x = 28,867.22 × 11,486.89
  4. Step 4: Simplify right side
    20,918.13x = 331,594,580.75
  5. Step 5: Solve for x
    x = 331,594,580.75/20,918.13
  6. Step 6: Final answer
    x = 15,852.02

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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.