Home / 21,971.22-30,320.84-13,478.03

Finding the Fourth Proportional to 21,971.22, 30,320.84 and 13,478.03

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Solution

The fourth proportional to 21,971.22, 30,320.84 and 13,478.03 is: 18,600.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,971.22 : 30,320.84 = 13,478.03 : x
  2. Step 2: Convert to fraction form
    21,971.22/30,320.84 = 13,478.03/x
  3. Step 3: Cross multiply
    21,971.22x = 30,320.84 × 13,478.03
  4. Step 4: Simplify right side
    21,971.22x = 408,664,972.15
  5. Step 5: Solve for x
    x = 408,664,972.15/21,971.22
  6. Step 6: Final answer
    x = 18,600.01

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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.