Home / 21,213.82-31,790.64-15,623.32

Finding the Fourth Proportional to 21,213.82, 31,790.64 and 15,623.32

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Solution

The fourth proportional to 21,213.82, 31,790.64 and 15,623.32 is: 23,412.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,213.82 : 31,790.64 = 15,623.32 : x
  2. Step 2: Convert to fraction form
    21,213.82/31,790.64 = 15,623.32/x
  3. Step 3: Cross multiply
    21,213.82x = 31,790.64 × 15,623.32
  4. Step 4: Simplify right side
    21,213.82x = 496,675,341.72
  5. Step 5: Solve for x
    x = 496,675,341.72/21,213.82
  6. Step 6: Final answer
    x = 23,412.82

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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.