Home / 21,904.31-30,223.71-13,408.35

Finding the Fourth Proportional to 21,904.31, 30,223.71 and 13,408.35

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Solution

The fourth proportional to 21,904.31, 30,223.71 and 13,408.35 is: 18,500.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,904.31 : 30,223.71 = 13,408.35 : x
  2. Step 2: Convert to fraction form
    21,904.31/30,223.71 = 13,408.35/x
  3. Step 3: Cross multiply
    21,904.31x = 30,223.71 × 13,408.35
  4. Step 4: Simplify right side
    21,904.31x = 405,250,081.98
  5. Step 5: Solve for x
    x = 405,250,081.98/21,904.31
  6. Step 6: Final answer
    x = 18,500.93

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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.