Home / 21,909.51-30,233.42-13,408.11

Finding the Fourth Proportional to 21,909.51, 30,233.42 and 13,408.11

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Solution

The fourth proportional to 21,909.51, 30,233.42 and 13,408.11 is: 18,502.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,909.51 : 30,233.42 = 13,408.11 : x
  2. Step 2: Convert to fraction form
    21,909.51/30,233.42 = 13,408.11/x
  3. Step 3: Cross multiply
    21,909.51x = 30,233.42 × 13,408.11
  4. Step 4: Simplify right side
    21,909.51x = 405,372,954.00
  5. Step 5: Solve for x
    x = 405,372,954.00/21,909.51
  6. Step 6: Final answer
    x = 18,502.15

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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.