Home / 21,207.82-31,781.67-15,617.29

Finding the Fourth Proportional to 21,207.82, 31,781.67 and 15,617.29

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Solution

The fourth proportional to 21,207.82, 31,781.67 and 15,617.29 is: 23,403.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.82 : 31,781.67 = 15,617.29 : x
  2. Step 2: Convert to fraction form
    21,207.82/31,781.67 = 15,617.29/x
  3. Step 3: Cross multiply
    21,207.82x = 31,781.67 × 15,617.29
  4. Step 4: Simplify right side
    21,207.82x = 496,343,557.07
  5. Step 5: Solve for x
    x = 496,343,557.07/21,207.82
  6. Step 6: Final answer
    x = 23,403.80

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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.