Home / 21,736.23-29,995.43-12,781.68

Finding the Fourth Proportional to 21,736.23, 29,995.43 and 12,781.68

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Solution

The fourth proportional to 21,736.23, 29,995.43 and 12,781.68 is: 17,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,736.23 : 29,995.43 = 12,781.68 : x
  2. Step 2: Convert to fraction form
    21,736.23/29,995.43 = 12,781.68/x
  3. Step 3: Cross multiply
    21,736.23x = 29,995.43 × 12,781.68
  4. Step 4: Simplify right side
    21,736.23x = 383,391,923.81
  5. Step 5: Solve for x
    x = 383,391,923.81/21,736.23
  6. Step 6: Final answer
    x = 17,638.38

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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.