Home / 21,335.82-29,424.27-13,378.86

Finding the Fourth Proportional to 21,335.82, 29,424.27 and 13,378.86

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Solution

The fourth proportional to 21,335.82, 29,424.27 and 13,378.86 is: 18,450.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,335.82 : 29,424.27 = 13,378.86 : x
  2. Step 2: Convert to fraction form
    21,335.82/29,424.27 = 13,378.86/x
  3. Step 3: Cross multiply
    21,335.82x = 29,424.27 × 13,378.86
  4. Step 4: Simplify right side
    21,335.82x = 393,663,188.93
  5. Step 5: Solve for x
    x = 393,663,188.93/21,335.82
  6. Step 6: Final answer
    x = 18,450.81

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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.