Home / 21,161.12-31,754.86-19,190.32

Finding the Fourth Proportional to 21,161.12, 31,754.86 and 19,190.32

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Solution

The fourth proportional to 21,161.12, 31,754.86 and 19,190.32 is: 28,797.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.12 : 31,754.86 = 19,190.32 : x
  2. Step 2: Convert to fraction form
    21,161.12/31,754.86 = 19,190.32/x
  3. Step 3: Cross multiply
    21,161.12x = 31,754.86 × 19,190.32
  4. Step 4: Simplify right side
    21,161.12x = 609,385,924.96
  5. Step 5: Solve for x
    x = 609,385,924.96/21,161.12
  6. Step 6: Final answer
    x = 28,797.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.