Home / 20,918.35-28,842.97-14,208.31

Finding the Fourth Proportional to 20,918.35, 28,842.97 and 14,208.31

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Solution

The fourth proportional to 20,918.35, 28,842.97 and 14,208.31 is: 19,590.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,918.35 : 28,842.97 = 14,208.31 : x
  2. Step 2: Convert to fraction form
    20,918.35/28,842.97 = 14,208.31/x
  3. Step 3: Cross multiply
    20,918.35x = 28,842.97 × 14,208.31
  4. Step 4: Simplify right side
    20,918.35x = 409,809,859.08
  5. Step 5: Solve for x
    x = 409,809,859.08/20,918.35
  6. Step 6: Final answer
    x = 19,590.93

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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.