Home / 21,161.39-29,188.80-13,595.81

Finding the Fourth Proportional to 21,161.39, 29,188.80 and 13,595.81

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Solution

The fourth proportional to 21,161.39, 29,188.80 and 13,595.81 is: 18,753.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.39 : 29,188.80 = 13,595.81 : x
  2. Step 2: Convert to fraction form
    21,161.39/29,188.80 = 13,595.81/x
  3. Step 3: Cross multiply
    21,161.39x = 29,188.80 × 13,595.81
  4. Step 4: Simplify right side
    21,161.39x = 396,845,232.98
  5. Step 5: Solve for x
    x = 396,845,232.98/21,161.39
  6. Step 6: Final answer
    x = 18,753.27

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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.