Home / 21,657.57-29,890.04-13,161.08

Finding the Fourth Proportional to 21,657.57, 29,890.04 and 13,161.08

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Solution

The fourth proportional to 21,657.57, 29,890.04 and 13,161.08 is: 18,163.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,657.57 : 29,890.04 = 13,161.08 : x
  2. Step 2: Convert to fraction form
    21,657.57/29,890.04 = 13,161.08/x
  3. Step 3: Cross multiply
    21,657.57x = 29,890.04 × 13,161.08
  4. Step 4: Simplify right side
    21,657.57x = 393,384,992.39
  5. Step 5: Solve for x
    x = 393,384,992.39/21,657.57
  6. Step 6: Final answer
    x = 18,163.86

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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.