Home / 21,290.27-29,387.39-13,736.81

Finding the Fourth Proportional to 21,290.27, 29,387.39 and 13,736.81

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Solution

The fourth proportional to 21,290.27, 29,387.39 and 13,736.81 is: 18,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290.27 : 29,387.39 = 13,736.81 : x
  2. Step 2: Convert to fraction form
    21,290.27/29,387.39 = 13,736.81/x
  3. Step 3: Cross multiply
    21,290.27x = 29,387.39 × 13,736.81
  4. Step 4: Simplify right side
    21,290.27x = 403,688,992.83
  5. Step 5: Solve for x
    x = 403,688,992.83/21,290.27
  6. Step 6: Final answer
    x = 18,961.20

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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.