Home / 20,776.89-28,669.62-13,117.26

Finding the Fourth Proportional to 20,776.89, 28,669.62 and 13,117.26

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Solution

The fourth proportional to 20,776.89, 28,669.62 and 13,117.26 is: 18,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,776.89 : 28,669.62 = 13,117.26 : x
  2. Step 2: Convert to fraction form
    20,776.89/28,669.62 = 13,117.26/x
  3. Step 3: Cross multiply
    20,776.89x = 28,669.62 × 13,117.26
  4. Step 4: Simplify right side
    20,776.89x = 376,066,859.64
  5. Step 5: Solve for x
    x = 376,066,859.64/20,776.89
  6. Step 6: Final answer
    x = 18,100.25

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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.