Home / 21,084.68-29,110.32-13,138.56

Finding the Fourth Proportional to 21,084.68, 29,110.32 and 13,138.56

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Solution

The fourth proportional to 21,084.68, 29,110.32 and 13,138.56 is: 18,139.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,084.68 : 29,110.32 = 13,138.56 : x
  2. Step 2: Convert to fraction form
    21,084.68/29,110.32 = 13,138.56/x
  3. Step 3: Cross multiply
    21,084.68x = 29,110.32 × 13,138.56
  4. Step 4: Simplify right side
    21,084.68x = 382,467,685.94
  5. Step 5: Solve for x
    x = 382,467,685.94/21,084.68
  6. Step 6: Final answer
    x = 18,139.60

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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.