Home / 21,790.89-30,085.43-13,412.25

Finding the Fourth Proportional to 21,790.89, 30,085.43 and 13,412.25

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Solution

The fourth proportional to 21,790.89, 30,085.43 and 13,412.25 is: 18,517.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.89 : 30,085.43 = 13,412.25 : x
  2. Step 2: Convert to fraction form
    21,790.89/30,085.43 = 13,412.25/x
  3. Step 3: Cross multiply
    21,790.89x = 30,085.43 × 13,412.25
  4. Step 4: Simplify right side
    21,790.89x = 403,513,241.46
  5. Step 5: Solve for x
    x = 403,513,241.46/21,790.89
  6. Step 6: Final answer
    x = 18,517.52

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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.