Home / 21,942-30,252.51-18,313.29

Finding the Fourth Proportional to 21,942, 30,252.51 and 18,313.29

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Solution

The fourth proportional to 21,942, 30,252.51 and 18,313.29 is: 25,249.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942 : 30,252.51 = 18,313.29 : x
  2. Step 2: Convert to fraction form
    21,942/30,252.51 = 18,313.29/x
  3. Step 3: Cross multiply
    21,942x = 30,252.51 × 18,313.29
  4. Step 4: Simplify right side
    21,942x = 554,022,988.86
  5. Step 5: Solve for x
    x = 554,022,988.86/21,942
  6. Step 6: Final answer
    x = 25,249.43

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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.