Home / 20,301.75-28,019.12-11,918.25

Finding the Fourth Proportional to 20,301.75, 28,019.12 and 11,918.25

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Solution

The fourth proportional to 20,301.75, 28,019.12 and 11,918.25 is: 16,448.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,301.75 : 28,019.12 = 11,918.25 : x
  2. Step 2: Convert to fraction form
    20,301.75/28,019.12 = 11,918.25/x
  3. Step 3: Cross multiply
    20,301.75x = 28,019.12 × 11,918.25
  4. Step 4: Simplify right side
    20,301.75x = 333,938,817.35
  5. Step 5: Solve for x
    x = 333,938,817.35/20,301.75
  6. Step 6: Final answer
    x = 16,448.77

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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.